# STN

## STN Units System

The following provides complete information about the STN Units system. The STN Units system was developed to support the expression of Units information for search and retrieval within STN.

The STN Units system may also be used to express Units information within the Z39.50 protocol.

**Introduction to STN Units System**

The STN Units system was developed to support the expression of Units information for search and retrieval within STN.

The STN Units system is organized in a set of tables, corresponding to Unit Types. Within each Unit Type, the supported Units are listed. For example, the table for Unit Type = Length contains various supported length units supported by STN, such as meter, angstrom, and fathom. Where appropriate, conversion factors between the STN Units system and the SI units system are included for each supported unit.

The STN Units system may also be used to express Units information within the Z39.50 protocol. Read more about Using STN Units within Z39.50 below.

**Table of Conversion Factors**

1. Conversion factors are taken from "Quantities, Units and Symbols in Physical Chemistry (IUPAC, 1988), "Conversion Tables of Units for Science & Engineering (Ari L. Horvath, Elsevier, 1986), and "CRC Handbook of Chemistry and Physics" or are calculated directly from these publications. In most cases, unit symbols are taken from the recommendations in ISO 2955- 1974 (E). For units that did not appear in this publication, symbols were taken from the IUPAC publication cited above.

2. Both abbreviations and the entire unit name may be used, except for multi-word units. Since spaces are not allowed in the unit symbols, multi-word unit terms do not make a lot of sense, and thus are only represented by abbreviations.

3. The units conversion procedure will remove a terminal "s" from a unit designation if no designation with the appended "s" can be found. Thus plurals of unit designations need to be added to the conversion table only in those cases where the plural form is not created merely by adding an "s" to the singular form.

**Using STN Units within Z39.50**

Z39.50 is an American National Standard that specifies an interoperable protocol and services for information search and retrieval. The Z39.50 protocol specifies formats and procedures governing the exchange of messages between a client and server, enabling the client to request that the server search databases for information that meets specified criteria, and to retrieve some or all of the identified information.

**Within the Z39.50 protocol, units of measure are expressed using the following ASN.1 definition for Unit and IntUnit: **

Unit ::= SEQUENCE{

unitSystem [1] InternationalString OPTIONAL,

unitType [2] StringOrNumeric OPTIONAL,

unit [3] StringOrNumeric OPTIONAL,

scaleFactor [4] IMPLICIT INTEGER OPTIONAL}

**IntUnit is simply an integer value together with a unit, and is defined as: **

IntUnit ::= SEQUENCE{

value [1] IMPLICIT INTEGER,

unitUsed [2] IMPLICIT Unit}

**In the above definition: **

Unit Systemprovides the context for the unit type and unit.

Systems in common use in the scientific and technical communities

include SI, MKS, CGS, FPS, ENG, and STN. In addition to existing

standard unit systems, the unit system 'z3950' will be used to

register those unit types/units needed by implementors and not

defined by other known systems. Values of unit type and unit under

the system 'z3950'will be maintained by the Z39.50 Maintenance

Agency.

Unit Typeis, for example, 'Mass'.

Unitis, for example, 'Kilograms' (when unit type is 'Mass').

Scale Factoris an integer scale factor, base 10. For example, 9

would mean that the actual value is the given value times 10 to the

9th power.

**When using STN Units within Z39.50, the following conventions will be followed: **

unitSystem = "STN"For further information on the Z39.50 standard, see the Z39.50 Maintenance Agency Home Page.

unitType = STN Unit Type (eg, "length")

unit = STN unit (eg, "meter")

For further information on using Units within Z39.50, see the Z39.50 Maintenance Agency information on the Z39.50 Maintenance Agency Home Page.

**Unit Multipliers**

Decimal multipliers for unit symbols are taken from the recommendations in ISO 2955-174 (E) and are listed below. Both the abbreviation and the complete name may be used. Decimal multipliers may be used with any unit symbol except for the symbols for temperature. Combinations of decimal multipliers and unit symbols that eliminate one or more of the vowels of each when combined are listed in the conversion table, e.g., micro + ohm = microhm.

Multiplier Symbol Factor by which the

unit is multiplied

t, tera 1E+12 = 10**12

g, giga 1E+09 = 10**9

ma, mega 1E+06 = 10**6

k, kilo 1E+03 = 10**3

h, hecto 1E+02 = 10**2

da, deca 1E+01 = 10

d, deci 1E-01 = 10**-1

c, centi 1E-02 = 10**-2

m, milli 1E-03 = 10**-3

u, micro 1E-06 = 10**-6

n, nano 1E-09 = 10**-9

p, pico 1E-12 = 10**-12

f, femto 1E-15 = 10**-15

a, atto 1E-18 = 10**-18

**Units Table **

**Notes about these tables: **

- In the following table, unit symbols are often followed by the complete name of the unit in parentheses. The text in parentheses is not part of the abbreviation.
- # after a conversion factor denotes a value that is accurate to +-5 in the rightmost digit.
- (CRC) after a conversion factor denotes a value taken from the CRC Handbook of Chemistry and Physics.

**Index to Unit Types:**

Acceleration

Amount of substance

Area

Computer terminology

Dynamic viscosity

Electric capacitance

Electric charge

Electric conductance

Electric current

Electric dipole moment

Electric potential

Electric quadrupole moment

Electric resistance

Energy

Entropy, heat capacity

Force

Frequency

Kinematic viscosity

Length

Magnetic field strength

Magnetic flax density

Magnetic flux

Magnetomotive force

Mass

Molar entropy, molar heat capacity

Noise intensity

Plane angle

Power

Pressure

Radiation

Solubility parameter

Temperature

Time

Velocity

Volume

Other

## Length

Unit = fathom (marine depth)

Corresponding SI Dimension = m

Unit to SI Dimension Factor = 1.8288

Unit = earthradius (geocentric distance)

Corresponding SI Dimension = m

Unit to SI Dimension Factor = 6378140

Unit = solarradius (heliocentric distance)

Corresponding SI Dimension = m

Unit to SI Dimension Factor = 6.962743E+08

Unit = earthradii (geocentric distance)

Corresponding SI Dimension = m

Unit to SI Dimension Factor = 6378140

Unit = solarradii (heliocentric distance)

Corresponding SI Dimension = m

Unit to SI Dimension Factor = 6.962743E+08

Unit = m (meter)

Corresponding SI Dimension = m

Unit to SI Dimension Factor = 1

Unit = meter

Corresponding SI Dimension = m

Unit to SI Dimension Factor = 1

Unit = metre

Corresponding SI Dimension = m

Unit to SI Dimension Factor = 1

Unit = A (angstrom)

Corresponding SI Dimension = m

Unit to SI Dimension Factor = 1E-10

Unit = ang (angstrom)

Corresponding SI Dimension = m

Unit to SI Dimension Factor = 1E-10

Unit = angstrom

Corresponding SI Dimension = m

Unit to SI Dimension Factor = 1E-10

Unit = mu (micron)

Corresponding SI Dimension = m

Unit to SI Dimension Factor = 1E-06

Unit = E-03mm

Corresponding SI Dimension = m

Unit to SI Dimension Factor = 1E-06

Unit = micron

Corresponding SI Dimension = m

Unit to SI Dimension Factor = 1E-06

Unit = f (fermi)

Corresponding SI Dimension = m

Unit to SI Dimension Factor = 1E-15

Unit = fermi

Corresponding SI Dimension = m

Unit to SI Dimension Factor = 1E-15

Unit = in (inch)

Corresponding SI Dimension = m

Unit to SI Dimension Factor = 0.0254

Unit = inch

Corresponding SI Dimension = m

Unit to SI Dimension Factor = 0.0254

Unit = inches

Corresponding SI Dimension = m

Unit to SI Dimension Factor = 0.0254

Unit = ft (feet)

Corresponding SI Dimension = m

Unit to SI Dimension Factor = 0.3048

Unit = 4ft

Corresponding SI Dimension = m

Unit to SI Dimension Factor = 1.2192

Unit = foot

Corresponding SI Dimension = m

Unit to SI Dimension Factor = 0.3048

Unit = feet

Corresponding SI Dimension = m

Unit to SI Dimension Factor = 0.3048

Unit = yd (yard)

Corresponding SI Dimension = m

Unit to SI Dimension Factor = 0.9144

Unit = yard

Corresponding SI Dimension = m

Unit to SI Dimension Factor = 0.9144

Unit = mi (mile)

Corresponding SI Dimension = m

Unit to SI Dimension Factor = 1609.344

Unit = mile

Corresponding SI Dimension = m

Unit to SI Dimension Factor = 1609.344

Unit = mil

Corresponding SI Dimension = m

Unit to SI Dimension Factor = 2.54E-05

Unit = AU (astronomical unit)

Corresponding SI Dimension = m

Unit to SI Dimension Factor = 1.49600E+11

Unit = pc (parsec)

Corresponding SI Dimension = m

Unit to SI Dimension Factor = 3.08568E+16

Unit = parsec

Corresponding SI Dimension = m

Unit to SI Dimension Factor = 3.08568E+16

Unit = ly (light year)

Corresponding SI Dimension = m

Unit to SI Dimension Factor = 9.46053E+15## Area

Unit = m**2

Corresponding SI Dimension = m**2

Unit to SI Dimension Factor = 1

Unit = b (barn)

Corresponding SI Dimension = m**2

Unit to SI Dimension Factor = 1E-28

Unit = acre

Corresponding SI Dimension = m**2

Unit to SI Dimension Factor = 4.04686E+03

Unit = ha (hectare)

Corresponding SI Dimension = m**2

Unit to SI Dimension Factor = 1E+4

Unit = barn

Corresponding SI Dimension = m**2

Unit to SI Dimension Factor = 1E-28

Unit = a (are)

Corresponding SI Dimension = m**2

Unit to SI Dimension Factor = 1E+02

Unit = are

Corresponding SI Dimension = m**2

Unit to SI Dimension Factor = 1E+02

Unit = hectare

Corresponding SI Dimension = m**2

Unit to SI Dimension Factor = 1E+04

Unit = cirmil (circular mil = area of a circle 1 mil in diameter)

Corresponding SI Dimension = m**2

Unit to SI Dimension Factor = 5.0670748E-10 (CRC)

Unit = cirin (circular inch = area of a circle 1 in in diameter)

Corresponding SI Dimension = m**2

Unit to SI Dimension Factor = 5.0670748E-04 (CRC)## Volume

Unit = m**3

Corresponding SI Dimension = m**3

Unit to SI Dimension Factor = 1

Unit = L (liter)

Corresponding SI Dimension = m**3

Unit to SI Dimension Factor = 1E-03

Unit = liter

Corresponding SI Dimension = m**3

Unit to SI Dimension Factor = 1E-03

Unit = litre

Corresponding SI Dimension = m**3

Unit to SI Dimension Factor = 1E-03

Unit = lambda

Corresponding SI Dimension = m**3

Unit to SI Dimension Factor = 1E-09

Unit = liquidpint (US)

Corresponding SI Dimension = m**3

Unit to SI Dimension Factor = 4.731765E-04

Unit = liqpt (US)

Corresponding SI Dimension = m**3

Unit to SI Dimension Factor = 4.731765E-04

Unit = fluidounce (US)

Corresponding SI Dimension = m**3

Unit to SI Dimension Factor = 2.9573516E-05

Unit = gal (US gallon)

Corresponding SI Dimension = m**3

Unit to SI Dimension Factor = 3.78541E-03

Unit = gallUS

Corresponding SI Dimension = m**3

Unit to SI Dimension Factor = 3.78541E-03

Unit = gallon (US gallon)

Corresponding SI Dimension = m**3

Unit to SI Dimension Factor = 3.78541E-03

Unit = galUK (UK gallon)

Corresponding SI Dimension = m**3

Unit to SI Dimension Factor = 4.54609E-03

Unit = gallonUK (UK gallon)

Corresponding SI Dimension = m**3

Unit to SI Dimension Factor = 4.54609E-03

Unit = pt (US liquid pint)

Corresponding SI Dimension = m**3

Unit to SI Dimension Factor = 4.7317625E-04

Unit = pint (US liquid pint)

Corresponding SI Dimension = m**3

Unit to SI Dimension Factor = 4.7317625E-04

Unit = ptUK (UK liquid pint)

Corresponding SI Dimension = m**3

Unit to SI Dimension Factor = 5.6826125E-04

Unit = pintUK

Corresponding SI Dimension = m**3

Unit to SI Dimension Factor = 5.6826125E-04

Unit = floz (US fluid ounce)

Corresponding SI Dimension = m**3

Unit to SI Dimension Factor = 2.9573516E-05

Unit = ozfl (US fluid ounce)

Corresponding SI Dimension = m**3

Unit to SI Dimension Factor = 2.9573516E-05

Unit = flozUK (UK fluid ounce)

Corresponding SI Dimension = m**3

Unit to SI Dimension Factor = 2.8413063E-05

Unit = ozflUK (UK fluid ounce)

Corresponding SI Dimension = m**3

Unit to SI Dimension Factor = 2.8413063E-05

Unit = qt (US liquid quart)

Corresponding SI Dimension = m**3

Unit to SI Dimension Factor = 9.46353E-04

Unit = quart

Corresponding SI Dimension = m**3

Unit to SI Dimension Factor = 9.46353E-04

Unit = qtUK (UK liquid quart)

Corresponding SI Dimension = m**3

Unit to SI Dimension Factor = 1.1365225E-03

Unit = quartUK

Corresponding SI Dimension = m**3

Unit to SI Dimension Factor = 1.1365225E-03## Mass

Unit = kg (kilogram)

Corresponding SI Dimension = kg

Unit to SI Dimension Factor = 1

Unit = kilogram

Corresponding SI Dimension = kg

Unit to SI Dimension Factor = 1

Unit = lb (pound avoirdupois)

Corresponding SI Dimension = kg

Unit to SI Dimension Factor = 0.45359237

Unit = pound

Corresponding SI Dimension = kg

Unit to SI Dimension Factor = 0.45359237

Unit = oz (ounce avoirdupois)

Corresponding SI Dimension = kg

Unit to SI Dimension Factor = 2.83495E-02 #

Unit = ounce

Corresponding SI Dimension = kg

Unit to SI Dimension Factor = 2.83495E-03 #

Unit = g (gram)

Corresponding SI Dimension = kg

Unit to SI Dimension Factor = 1E-03

Unit = gram

Corresponding SI Dimension = kg

Unit to SI Dimension Factor = 1E-03

Unit = gr (grain)

Corresponding SI Dimension = kg

Unit to SI Dimension Factor = 6.479891E-05

Unit = grain

Corresponding SI Dimension = kg

Unit to SI Dimension Factor = 6.479891E-05

Unit = Da (dalton)

Corresponding SI Dimension = kg

Unit to SI Dimension Factor = 1.66054E-27 #

Unit = dalton

Corresponding SI Dimension = kg

Unit to SI Dimension Factor = 1.66054E-27 #

Unit = u (unified atomic mass unit)

Corresponding SI Dimension = kg

Unit to SI Dimension Factor = 1.66054E-27 #

Unit = amu

Corresponding SI Dimension = kg

Unit to SI Dimension Factor = 1.66054E-27 #

Unit = ton (2000 lb)

Corresponding SI Dimension = kg

Unit to SI Dimension Factor = 9.0718474E+02 (CRC)

Unit = t (tonne, metric ton)

Corresponding SI Dimension = kg

Unit to SI Dimension Factor = 1E+03

Unit = metric ton

Corresponding SI Dimension = kg

Unit to SI Dimension Factor = 1E+03

Unit = kiloton

Corresponding SI Dimension = kg

Unit to SI Dimension Factor = 1E+06

Unit = short ton

Corresponding SI Dimension = kg

Unit to SI Dimension Factor = 907.18474

Unit = tonne

Corresponding SI Dimension = kg

Unit to SI Dimension Factor = 1E+03

Unit = Msol (mean solar mass)

Corresponding SI Dimension = kg

Unit to SI Dimension Factor = 1.98E+30## Amount of substance

Unit = mol (mole)

Corresponding SI Dimension = mol

Unit to SI Dimension Factor = 1

Unit = val (valar mass)

Corresponding SI Dimension = val

Unit to SI Dimension Factor = 1

Unit = mole

Corresponding SI Dimension = mol

Unit to SI Dimension Factor = 1

Unit = gmole

Corresponding SI Dimension = mol

Unit to SI Dimension Factor = 1

Unit = grammole

Corresponding SI Dimension = mol

Unit to SI Dimension Factor = 1

Unit = poundmole

Corresponding SI Dimension = mol

Unit to SI Dimension Factor = 453.59237

Unit = lbmol

Corresponding SI Dimension = mol

Unit to SI Dimension Factor = 453.59237

Unit = lbmole

Corresponding SI Dimension = mol

Unit to SI Dimension Factor = 453.59237

Unit = molfrac

Corresponding SI Dimension = molfrac

Unit to SI Dimension Factor = 1

Unit = molefrac

Corresponding SI Dimension = molfrac

Unit to SI Dimension Factor = 1## Time

Unit = s (second)

Corresponding SI Dimension = s

Unit to SI Dimension Factor = 1

Unit = sec (second)

Corresponding SI Dimension = s

Unit to SI Dimension Factor = 1

Unit = second

Corresponding SI Dimension = s

Unit to SI Dimension Factor = 1

Unit = min (minute)

Corresponding SI Dimension = s

Unit to SI Dimension Factor = 60

Unit = minute

Corresponding SI Dimension = s

Unit to SI Dimension Factor = 60

Unit = h (hour)

Corresponding SI Dimension = s

Unit to SI Dimension Factor = 3.600E+03

Unit = hr (hour)

Corresponding SI Dimension = s

Unit to SI Dimension Factor = 3.600E+03

Unit = hour

Corresponding SI Dimension = s

Unit to SI Dimension Factor = 3.600E+03

Unit = d (day)

Corresponding SI Dimension = s

Unit to SI Dimension Factor = 8.6400E+04

Unit = day

Corresponding SI Dimension = s

Unit to SI Dimension Factor = 8.6400E+04

Unit = days

Corresponding SI Dimension = s

Unit to SI Dimension Factor = 8.6400E+04

Unit = wk (week)

Corresponding SI Dimension = s

Unit to SI Dimension Factor = 6.04800E+05

Unit = week

Corresponding SI Dimension = s

Unit to SI Dimension Factor = 6.04800E+05

Unit = month

Corresponding SI Dimension = mo

Unit to SI Dimension Factor = 1

Unit = mo

Corresponding SI Dimension = mo

Unit to SI Dimension Factor = 1

Unit = a (mean solar year)

Corresponding SI Dimension = s

Unit to SI Dimension Factor = 3.1556926E+07

Unit = yr (mean solar year)

Corresponding SI Dimension = s

Unit to SI Dimension Factor = 3.1556926E+07

Unit = year (calendar)

Corresponding SI Dimension = s

Unit to SI Dimension Factor = 3.1536E+07

Unit = Sv (svedberg)

Corresponding SI Dimension = s

Unit to SI Dimension Factor = 1E-13

Unit = svedberg

Corresponding SI Dimension = s

Unit to SI Dimension Factor = 1E-13## Acceleration

Unit = m/s**2

Corresponding SI Dimension = m/s**2

Unit to SI Dimension Factor = 1

Unit = Gal (galileo)

Corresponding SI Dimension = m/s**2

Unit to SI Dimension Factor = 1E-02

Unit = galileo

Corresponding SI Dimension = m/s**2

Unit to SI Dimension Factor = 1E-02

Unit = g (standard acceleration of free fall)

Corresponding SI Dimension = m/s**2

Unit to SI Dimension Factor = 9.80665

Unit = mph/s

Corresponding SI Dimension = m/s**2

Unit to SI Dimension Factor = 0.447037222

Unit = mph/sec

Corresponding SI Dimension = m/s**2

Unit to SI Dimension Factor = 0.447037222

Unit = mphps

Corresponding SI Dimension = m/s**2

Unit to SI Dimension Factor = 0.447037222## Velocity

Unit = m/s Corresponding SI Dimension = m/s Unit to SI Dimension Factor = 1 Unit = mph Corresponding SI Dimension = m/s Unit to SI Dimension Factor = 0.447037222 Unit = fps Corresponding SI Dimension = m/s Unit to SI Dimension Factor = 0.3048 Unit = fpm Corresponding SI Dimension = m/s Unit to SI Dimension Factor = 0.00508 (CRC) Unit = ips Corresponding SI Dimension = m/s Unit to SI Dimension Factor = 0.0254 Unit = kmps Corresponding SI Dimension = m/s Unit to SI Dimension Factor = 1E+03 Unit = %/s Corresponding SI Dimension = %/s Unit to SI Dimension Factor = 1## Force

Unit = N (newton) Corresponding SI Dimension = N Unit to SI Dimension Factor = 1 Unit = newton Corresponding SI Dimension = N Unit to SI Dimension Factor = 1 Unit = kg*m/s**2 Corresponding SI Dimension = N Unit to SI Dimension Factor = 1 Unit = dyn (dyne) Corresponding SI Dimension = N Unit to SI Dimension Factor = 1E-05 Unit = dyne Corresponding SI Dimension = N Unit to SI Dimension Factor = 1E-05 Unit = kgf (killogram-force) Corresponding SI Dimension = N Unit to SI Dimension Factor = 9.80665 Unit = kg (killogram-force) Corresponding SI Dimension = N Unit to SI Dimension Factor = 9.80665 Unit = gf (gram-force) Corresponding SI Dimension = N Unit to SI Dimension Factor = 9.80665E-03 Unit = g (gram-force) Corresponding SI Dimension = N Unit to SI Dimension Factor = 9.80665E-03 Unit = lbf (pound-force) Corresponding SI Dimension = N Unit to SI Dimension Factor = 4.448221677 (CRC) Unit = lb (pound-force) Corresponding SI Dimension = N Unit to SI Dimension Factor = 4.448221677 (CRC) Unit = pdl (poundal) Corresponding SI Dimension = N Unit to SI Dimension Factor = 1.38255E-01 (CRC) Unit = poundal Corresponding SI Dimension = N Unit to SI Dimension Factor = 1.38255E-01 (CRC) Unit = kip (=1000 lbf) Corresponding SI Dimension = N Unit to SI Dimension Factor = 4.448221677E+03## Energy

Unit = J (joule) Corresponding SI Dimension = J Unit to SI Dimension Factor = 1 Unit = joule Corresponding SI Dimension = J Unit to SI Dimension Factor = 1 Unit N*m Corresponding SI Dimension = J Unit to SI Dimension Factor = 1 Unit = kg*m**2/s**2 Corresponding SI Dimension = J Unit to SI Dimension Factor = 1 Unit = erg (erg) Corresponding SI Dimension = J Unit to SI Dimension Factor = 1E-07 Unit = Ry (rydberg) Corresponding SI Dimension = J Unit to SI Dimension Factor = 2.1798741E-18 # Unit = rydberg Corresponding SI Dimension = J Unit to SI Dimension Factor = 2.1798741E-18 # Unit = eV (electronvolt) Corresponding SI Dimension = J Unit to SI Dimension Factor = 1.60217733E-19 # Unit = electronvolt Corresponding SI Dimension = J Unit to SI Dimension Factor = 1.60217733E-19 # Unit = ITcal (calorie, international) Corresponding SI Dimension = J Unit to SI Dimension Factor = 4.1868 Unit = cal (calorie, thermal) Corresponding SI Dimension = J Unit to SI Dimension Factor = 4.184 Unit = calIT (calorie, international) Corresponding SI Dimension = J Unit to SI Dimension Factor = 4.1868 Unit = Latm (liter atmosphere) Corresponding SI Dimension = J Unit to SI Dimension Factor = 101.325 Unit = Btu (British thermal unit) Corresponding SI Dimension = J Unit to SI Dimension Factor = 1055.06 Unit = Whr (watt-hour, absolute) Corresponding SI Dimension = J Unit to SI Dimension Factor = 3600 Unit = Wh (watt-hour, absolute) Corresponding SI Dimension = J Unit to SI Dimension Factor = 3600 Unit = ftlbf Corresponding SI Dimension = J Unit to SI Dimension Factor = 1.35582 (CRC) Unit = inlbf Corresponding SI Dimension = J Unit to SI Dimension Factor =0.112985 Unit = hp*h Corresponding SI Dimension = J Unit to SI Dimension Factor = 2.68452E+06 (CRC) Unit = hp*hr Corresponding SI Dimension = J Unit to SI Dimension Factor = 2.68452E+06 (CRC) Unit = hphr Corresponding SI Dimension = J Unit to SI Dimension Factor = 2.68452E+06 (CRC)## Pressure

Unit = Pa (pascal) Corresponding SI Dimension = Pa Unit to SI Dimension Factor = 1 Unit = pascal Corresponding SI Dimension = Pa Unit to SI Dimension Factor = 1 Unit = micropascal Corresponding SI Dimension = Pa Unit to SI Dimension Factor = 1E-06 Unit = MPa (=10**6 Pa) Corresponding SI Dimension = Pa Unit to SI Dimension Factor = 1E+06 Unit = milliPa (=10**-3 Pa) Corresponding SI Dimension = Pa Unit to SI Dimension Factor = 1E-03 Unit = N/m**2 Corresponding SI Dimension = Pa Unit to SI Dimension Factor = 1 Unit = kg/m*s**2 Corresponding SI Dimension = Pa Unit to SI Dimension Factor = 1 Unit = atm (standard atmosphere) Corresponding SI Dimension = Pa Unit to SI Dimension Factor = 1.01325E+05 Unit = atmosphere Corresponding SI Dimension = Pa Unit to SI Dimension Factor = 1.01325E+05 Unit = bar (bar) Corresponding SI Dimension = Pa Unit to SI Dimension Factor = 1E+05 Unit = Torr (torr) Corresponding SI Dimension = Pa Unit to SI Dimension Factor = 133.322 # Unit = Tor (torr) Corresponding SI Dimension = Pa Unit to SI Dimension Factor = 133.322 # Unit = mmHg (millimeter of Hg - conventional) Corresponding SI Dimension = Pa Unit to SI Dimension Factor = 133.322 # Unit = inHg (inches of Hg - conventional) Corresponding SI Dimension = Pa Unit to SI Dimension Factor = 3386.39 (CRC) Unit = mmH2O (millimeters of water - conventional) Corresponding SI Dimension = Pa Unit to SI Dimension Factor = 9.80665 Unit = cmHg (centimeter of Hg - conventional) Corresponding SI Dimension = Pa Unit to SI Dimension Factor = 1333.22 # Unit = psi (pounds force per square inch) Corresponding SI Dimension = Pa Unit to SI Dimension Factor = 6.894757E+03 # Unit = psia (pounds force per square inch, absolute) Corresponding SI Dimension = Pa Unit to SI Dimension Factor = 6.894757E+03 # Unit = psf (pounds force per square foot) Corresponding SI Dimension = Pa Unit to SI Dimension Factor = 47.8803 (CRC) Unit = lbf/in**2 Corresponding SI Dimension = Pa Unit to SI Dimension Factor = 6.894757E+03 # Unit = ksi (10**3 pounds force per square inch) Corresponding SI Dimension = Pa Unit to SI Dimension Factor = 6.894757E+06 # Unit = E+03ksi (10**6 pounds force per square inch) Corresponding SI Dimension = Pa Unit to SI Dimension Factor = 6.894757E+09 # Unit = Msi (10**6 pounds force per square inch) Corresponding SI Dimension = Pa Unit to SI Dimension Factor = 6.894757E+09 ### Power

Unit = W (watt) Corresponding SI Dimension = W Unit to SI Dimension Factor = 1 Unit = watt Corresponding SI Dimension = W Unit to SI Dimension Factor = 1 Unit = kg*m**2/s**3 Corresponding SI Dimension = W Unit to SI Dimension Factor = 1 Unit = J/s Corresponding SI Dimension = W Unit to SI Dimension Factor = 1 Unit = hp (horsepower, imperial) Corresponding SI Dimension = W Unit to SI Dimension Factor = 745.7 Unit = horsepower Corresponding SI Dimension = W Unit to SI Dimension Factor = 745.7 Unit = V*A Corresponding SI Dimension = VA Unit to SI Dimension Factor = 1 Unit to SI Scaling Factor = 0 Unit = VA Corresponding SI Dimension = VA Unit to SI Dimension Factor = 1 Unit to SI Scaling Factor = 0 Unit = voltampere Corresponding SI Dimension = VA Unit to SI Dimension Factor = 1 Unit to SI Scaling Factor = 0 Unit = V*Ar Corresponding SI Dimension = VAr Unit to SI Dimension Factor = 1 Unit to SI Scaling Factor = 0 Unit = VAr Corresponding SI Dimension = VAr Unit to SI Dimension Factor = 1 Unit to SI Scaling Factor = 0 Unit = var (voltampere reactive) Corresponding SI Dimension = VAr Unit to SI Dimension Factor = 1 Unit to SI Scaling Factor = 0## Dynamic viscosity

Unit = Pa*s Corresponding SI Dimension = Pa*s Unit to SI Dimension Factor = 1 Unit = kg/m*s Corresponding SI Dimension = Pa*s Unit to SI Dimension Factor = 1 Unit = P (poise) Corresponding SI Dimension = Pa*s Unit to SI Dimension Factor = 1E-01 Unit = Ps (poise) Corresponding SI Dimension = Pa*s Unit to SI Dimension Factor = 1E-01 Unit = poise Corresponding SI Dimension = Pa*s Unit to SI Dimension Factor = 1E-01 Unit = micropoise Corresponding SI Dimension = Pa*s Unit to SI Dimension Factor = 1E-07## Kinematic viscosity

Unit = m**2/s Corresponding SI Dimension = m**2/s Unit to SI Dimension Factor = 1 Unit = St (stokes) Corresponding SI Dimension = m**2/s Unit to SI Dimension Factor = 1E-04 Unit = stokes Corresponding SI Dimension = m**2/s Unit to SI Dimension Factor = 1E-04## Temperature

Unit = K (kelvin) Corresponding SI Dimension = K Unit to SI Dimension Factor = 1 Unit = kelvin Corresponding SI Dimension = K Unit to SI Dimension Factor = 1 Unit = degK Corresponding SI Dimension = K Unit to SI Dimension Factor = 1 Unit = degC (degree Centigrade/Celsius) Corresponding SI Dimension = K Unit to SI Dimension Factor = 1 Unit to SI Dimension Scaling Factor = 273.15 Unit = Cel (degree Celsius) Corresponding SI Dimension = K Unit to SI Dimension Factor = 1 Unit to SI Dimension Scaling Factor = 273.15 Unit = Centigrade Corresponding SI Dimension = K Unit to SI Dimension Factor = 1 Unit to SI Dimension Scaling Factor = 273.15 Unit = Celsius Corresponding SI Dimension = K Unit to SI Dimension Factor = 1 Unit to SI Dimension Scaling Factor = 273.15 Unit = C (degree Centigrade/Celsius) Corresponding SI Dimension = K Unit to SI Dimension Factor = 1 Unit to SI Dimension Scaling Factor = 273.15 Unit = degF (degree Fahrenheit) Corresponding SI Dimension = K Unit to SI Dimension Factor = 5/9 Unit to SI Dimension Scaling Factor = 255.372222 Unit = F (degree Fahrenheit) Corresponding SI Dimension = K Unit to SI Dimension Factor = 5/9 Unit to SI Dimension Scaling Factor = 255.372222 Unit = Fahrenheit Corresponding SI Dimension = K Unit to SI Dimension Factor = 5/9 Unit to SI Dimension Scaling Factor = 255.372222 Unit = degR (degree Rankine) Corresponding SI Dimension = K Unit to SI Dimension Factor = 5/9 Unit = R (degree Rankine) Corresponding SI Dimension = K Unit to SI Dimension Factor = 5/9 Unit = Rankine Corresponding SI Dimension = K Unit to SI Dimension Factor = 5/9## Entropy, heat capacity

Unit = J/K Corresponding SI Dimension = J/K Unit to SI Dimension Factor = 1 Unit = Cl (clausius) Corresponding SI Dimension = J/K Unit to SI Dimension Factor = 4.184 Unit = clausius Corresponding SI Dimension = J/K Unit to SI Dimension Factor = 4.184## Molar entropy, molar heat capacity

Unit = J/K*mol Corresponding SI Dimension = J/K*mol Unit to SI Dimension Factor = 1 Unit = eu (entropy unit) Corresponding SI Dimension = J/K*mol Unit to SI Dimension Factor = 4.184## Solubility parameter

Unit = cal**0.5/cm**1.5 Corresponding SI Dimension = J**0.5/m**1.5 Unit to SI Dimension Factor = 2.0454828E+03 Unit = cal**0.5/m**1.5 Corresponding SI Dimension = J**0.5/m**1.5 Unit to SI Dimension Factor = 2.0454828 Unit = H (hildebrand) Corresponding SI Dimension = J**0.5/m**1.5 Unit to SI Dimension Factor = 2.0454828E+03 (CRC) Unit = hildebrand Corresponding SI Dimension = J**0.5/m**1.5 Unit to SI Dimension Factor = 2.0454828E+03## Plane angle

Unit = rad (radian) Corresponding SI Dimension = rad Unit to SI Dimension Factor = 1 Unit = radian Corresponding SI Dimension = rad Unit to SI Dimension Factor = 1 Unit = deg (degree) Corresponding SI Dimension = rad Unit to SI Dimension Factor = 1.7453293E-02 (CRC) Unit = degree Corresponding SI Dimension = rad Unit to SI Dimension Factor = 1.7453293E-02 (CRC) Unit = min (minute) Corresponding SI Dimension = rad Unit to SI Dimension Factor = 2.9088821E-04 (CRC) Unit = sec (second) Corresponding SI Dimension = rad Unit to SI Dimension Factor = 4.8481368E-06 (CRC)## Electric current

Unit = A (ampere) Corresponding SI Dimension = A Unit to SI Dimension Factor = 1 Unit = ampere Corresponding SI Dimension = A Unit to SI Dimension Factor = 1 Unit = amp Corresponding SI Dimension = A Unit to SI Dimension Factor = 1 Unit = abA (abampere) Corresponding SI Dimension = A Unit to SI Dimension Factor = 1E+01 Unit = abampere Corresponding SI Dimension = A Unit to SI Dimension Factor = 1E+01 Unit to SI Dimension Scaling Factor = 0 Unit = statA (statampere) Corresponding SI Dimension = A Unit to SI Dimension Factor = 3.335635E-10 Unit = statampere Corresponding SI Dimension = A Unit to SI Dimension Factor = 3.335635E-10 Unit = biot Corresponding SI Dimension = A Unit to SI Dimension Factor = 1E+1 Unit = Bi (biot) Corresponding SI Dimension = A Unit to SI Dimension Factor = 1E+1## Electric charge

Unit = C (coulomb) Corresponding SI Dimension = C Unit to SI Dimension Factor = 1 Unit = coulomb Corresponding SI Dimension = C Unit to SI Dimension Factor = 1 Unit = statC (statcoulomb) Corresponding SI Dimension = C Unit to SI Dimension Factor = 3.335635E-10 Unit = statcoulomb Corresponding SI Dimension = A Unit to SI Dimension Factor = 3.335635E-10 Unit = abC (abcoulomb) Corresponding SI Dimension = A Unit to SI Dimension Factor = 1E+01 Unit = abcoulomb Corresponding SI Dimension = A Unit to SI Dimension Factor = 1E+01 Unit = Fr (franklin) Corresponding SI Dimension = C Unit to SI Dimension Factor = 3.335635E-10 Unit = franklin Corresponding SI Dimension = A Unit to SI Dimension Factor = 3.335635E-10 Unit = A*s Corresponding SI Dimension = C Unit to SI Dimension Factor = 1## Electric potential

Unit = V (volt) Corresponding SI Dimension = V Unit to SI Dimension Factor = 1 Unit = volt Corresponding SI Dimension = V Unit to SI Dimension Factor = 1 Unit = statV (statvolt) Corresponding SI Dimension = V Unit to SI Dimension Factor = 2.99793E+10 Unit = statvolt Corresponding SI Dimension = V Unit to SI Dimension Factor = 2.99793E+10 Unit = abV (abvolt) Corresponding SI Dimension = V Unit to SI Dimension Factor = 1E-08 Unit = abvolt Corresponding SI Dimension = V Unit to SI Dimension Factor = 1E-08 Unit = J/A*s Corresponding SI Dimension = V Unit to SI Dimension Factor = 1## Electric resistance

Unit = ohm Corresponding SI Dimension = ohm Unit to SI Dimension Factor = 1 Unit = kilohm Corresponding SI Dimension = ohm Unit to SI Dimension Factor = 1E+03 Unit = hectohm Corresponding SI Dimension = ohm Unit to SI Dimension Factor = 1E+02 Unit = microhm Corresponding SI Dimension = ohm Unit to SI Dimension Factor = 1E-06 Unit = nanohm Corresponding SI Dimension = ohm Unit to SI Dimension Factor = 1E-09 Unit = picohm Corresponding SI Dimension = ohm Unit to SI Dimension Factor = 1E-12 Unit = E+14ohm Corresponding SI Dimension = ohm Unit to SI Dimension Factor = 1E-14 Unit = statohm Corresponding SI Dimension = ohm Unit to SI Dimension Factor = 8.987584E+11 Unit = abohm Corresponding SI Dimension = ohm Unit to SI Dimension Factor = 1E-09 Unit = V/A Corresponding SI Dimension = ohm Unit to SI Dimension Factor = 1 Unit = m**2*kg/s**3*A**2 Corresponding SI Dimension = ohm Unit to SI Dimension Factor = 1## Electric dipole moment

Unit C*m Corresponding SI Dimension = C*m Unit to SI Dimension Factor = 1 Unit = D (debye) Corresponding SI Dimension = C*m Unit to SI Dimension Factor = 3.33564E-30 # Unit = debye Corresponding SI Dimension = C*m Unit to SI Dimension Factor = 3.33564E-30 ### Electric quadrupole moment

Unit = C*m**2 Corresponding SI Dimension = C*m**2 Unit to SI Dimension Factor = 1## Electric capacitance

Unit = F (farad) Corresponding SI Dimension = F Unit to SI Dimension Factor = 1 Unit = farad Corresponding SI Dimension = F Unit to SI Dimension Factor = 1 Unit = abF (abfarad) Corresponding SI Dimension = F Unit to SI Dimension Factor = 1E+09 Unit = abfarad Corresponding SI Dimension = F Unit to SI Dimension Factor = 1E+09 Unit to SI Dimension Scaling Factor = Unit = statF (statfarad) Corresponding SI Dimension = F Unit to SI Dimension Factor = 1.112646E-12 Unit = statfarad Corresponding SI Dimension = F Unit to SI Dimension Factor = 1.112646E-12 Unit = s**4*A**2/m**2*kg Corresponding SI Dimension = F Unit to SI Dimension Factor = 1## Electric conductance

Unit = S (siemens) Corresponding SI Dimension = S Unit to SI Dimension Factor = 1 Unit = siemens Corresponding SI Dimension = S Unit to SI Dimension Factor = 1 Unit = statS (statsiemens) Corresponding SI Dimension = S Unit to SI Dimension Factor = 1.112646E-12 Unit = statsiemens Corresponding SI Dimension = S Unit to SI Dimension Factor = 1.112646E-12 Unit = abS (absiemens) Corresponding SI Dimension = S Unit to SI Dimension Factor = 1E+09 Unit = absiemens Corresponding SI Dimension = S Unit to SI Dimension Factor = 1E+09 Unit = s**3*A**2/m**2*kg Corresponding SI Dimension = F Unit to SI Dimension Factor = 1 Unit = ohm**-1 Corresponding SI Dimension = S Unit to SI Dimension Factor = 1 Unit = mho Corresponding SI Dimension = S Unit to SI Dimension Factor = 1 Unit = statmho Corresponding SI Dimension = S Unit to SI Dimension Factor = 1.112646E-12 Unit = abmho Corresponding SI Dimension = S Unit to SI Dimension Factor = 1E+09## Frequency

Unit = Hz (hertz) Corresponding SI Dimension = Hz Unit to SI Dimension Factor = 1 Unit = hertz Corresponding SI Dimension = Hz Unit to SI Dimension Factor = 1 Unit = s**-1 Corresponding SI Dimension = Hz Unit to SI Dimension Factor = 1 Unit = cps (cycles/s) Corresponding SI Dimension = Hz Unit to SI Dimension Factor = 1 Unit = cycles/s Corresponding SI Dimension = Hz Unit to SI Dimension Factor = 1## Magnetic flax density

Unit = Wb/m**2 Corresponding SI Dimension = T Unit to SI Dimension Factor = 1 Unit = tesla Corresponding SI Dimension = T Unit to SI Dimension Factor = 1 Unit = kg/A*s**2 Corresponding SI Dimension = T Unit to SI Dimension Factor = 1 Unit = gauss Corresponding SI Dimension = T Unit to SI Dimension Factor = 1E-04 Unit = G (gauss) Corresponding SI Dimension = T Unit to SI Dimension Factor = 1E-04 Unit = Mx/cm**2 Corresponding SI Dimension = T Unit to SI Dimension Factor = 1E-04## Magnetic flux

Unit = Wb (weber) Corresponding SI Dimension = Wb Unit to SI Dimension Factor = 1 Unit = weber Corresponding SI Dimension = Wb Unit to SI Dimension Factor = 1 Unit = kg*m**2/A*s**2 Corresponding SI Dimension = Wb Unit to SI Dimension Factor = 1 Unit = Mx (maxwell) Corresponding SI Dimension = Wb Unit to SI Dimension Factor = 1E-08 Unit = maxwell Corresponding SI Dimension = Wb Unit to SI Dimension Factor = 1E-08## Magnetic field strength

Unit = oersted Corresponding SI Dimension = A/m Unit to SI Dimension Factor = 79.577472 Unit = Oe Corresponding SI Dimension = A/m Unit to SI Dimension Factor = 79.577472## Magnetomotive force

Unit = gilbert Corresponding SI Dimension = A Unit to SI Dimension Factor = 0.79577472 Unit = Gb Corresponding SI Dimension = A Unit to SI Dimension Factor = 0.79577472## Other

Unit = kayser (reciprocal length) Corresponding SI Dimension = m**-1 Unit to SI Dimension Factor = 1E-02 Unit = m**-1 (reciprocal length) Corresponding SI Dimension = m**-1 Unit to SI Dimension Factor = 1 Unit = 1/m (reciprocal length) Corresponding SI Dimension = m**-1 Unit to SI Dimension Factor = 1 Unit = ppm (parts/million) Corresponding SI Dimension = ppm Unit to SI Dimension Factor = 1 Unit = ppb (parts/billion) Corresponding SI Dimension = ppm Unit to SI Dimension Factor = 1E+03 Unit = ppt (parts/thousand) Corresponding SI Dimension = ppm Unit to SI Dimension Factor = 1E-03 Unit = pph (parts/handred) Corresponding SI Dimension = ppm Unit to SI Dimension Factor = 1E-04 Unit = 1.0E-06lb/lb Corresponding SI Dimension = kg/kg Unit to SI Dimension Factor = 1E+06 Unit = 1.0E-06lb/ft**3 Corresponding SI Dimension = kg/m**3 Unit to SI Dimension Factor = 1.60185E+07 Unit = % Corresponding SI Dimension = % Unit to SI Dimension Factor = 1 Unit = percent Corresponding SI Dimension = % Unit to SI Dimension Factor = 1 Unit = wt% Corresponding SI Dimension = % Unit to SI Dimension Factor = 1 Unit = vol% Corresponding SI Dimension = vol% Unit to SI Dimension Factor = 1 Unit = cycles Corresponding SI Dimension = cycles Unit to SI Dimension Factor = 1 Unit = 1000cycles Corresponding SI Dimension = cycles Unit to SI Dimension Factor = 1E+03 Unit = 1000 cycles Corresponding SI Dimension = cycles Unit to SI Dimension Factor = 1E+03 Unit = E+06cycles Corresponding SI Dimension = cycles Unit to SI Dimension Factor = 1E+06 Unit = arcs Corresponding SI Dimension = arcs Unit to SI Dimension Factor = 1 Unit = cents Corresponding SI Dimension = cents Unit to SI Dimension Factor = 1 Unit to SI Dimension Scalling Factor = 0 Unit = %IACS Corresponding SI DImension = 1/ohm*m Unit to SI Dimension Factor = 58 Unit = %IACSwt Corresponding SI Dimension = 1/ohm*m Unit to SI Dimension Factor = 6.5242 Unit to SI Dimension Scaling Factor = 1 Unit = percentIACS Corresponding SI DImension = 1/ohm*m Unit to SI Dimension Factor = 58 Unit = percentIACSwt Corresponding SI Dimension = 1/ohm*m Unit to SI Dimension Factor = 6.5242 Unit to SI Dimension Scaling Factor = 1 Unit = 1/ohm*m Corresponding SI Dimension = 1/ohm*m Unit to SI Dimension Factor = 1 Unit to SI Dimension Scaling Factor = 1## Computer terminology

Unit = bit Corresponding SI Dimension = bit Unit to SI Dimension Factor = 1 Unit = byte Corresponding SI Dimension = byte Unit to SI Dimension Factor = 1 Unit = kbyte Corresponding SI Dimension = byte Unit to SI Dimension Factor = 1024 Unit = kb Corresponding SI Dimension = byte Unit to SI Dimension Factor = 1024 Unit = kilobyte Corresponding SI Dimension = byte Unit to SI Dimension Factor = 1024 Unit = Mbyte Corresponding SI Dimension = byte Unit to SI Dimension Factor = 1048576 Unit = Mb Corresponding SI Dimension = byte Unit to SI Dimension Factor = 1048576 Unit = megabyte Corresponding SI Dimension = byte Unit to SI Dimension Factor = 1048576 Unit = Gbyte Corresponding SI Dimension = byte Unit to SI Dimension Factor = 1073741824 Unit = Gb Corresponding SI Dimension = byte Unit to SI Dimension Factor = 1073741824 Unit = gigabyte Corresponding SI Dimension = byte Unit to SI Dimension Factor = 1073741824 Unit = ips Corresponding SI Dimension = ips Unit to SI Dimension Factor = 1 Unit = i (instructions) Unit to SI Dimension Factor = 1 Unit = instructions Corresponding SI Dimension = i Unit to SI Dimension Factor = 1 Unit = flops Corresponding SI Dimension = flops Unit to SI Dimension Factor = 1 Unit = flo (floating point operations) Corresponding SI Dimension = flo Unit to SI Dimension Factor = 1 Unit = pixel Corresponding SI Dimension = pixel Unit to SI Dimension Factor = 1 Unit = cps (characters/second) Corresponding SI Dimension = cps Unit to SI Dimension Factor = 1 UUnit = c (characters) Corresponding SI Dimension = c Unit to SI Dimension Factor = 1 Unit = characters Corresponding SI Dimension = c Unit to SI Dimension Factor = 1## Noise intensity

Unit = dB (decibel) Corresponding SI Dimension = db Unit to SI Dimension Factor = 1 Unit = decibel Corresponding SI Dimension = db Unit to SI Dimension Factor = 1 Unit = B (Bel) Corresponding SI Dimension = db Unit to SI Dimension Factor = 10 Unit = Bel Corresponding SI Dimension = db Unit to SI Dimension Factor = 10## Radiation

Unit = Gy (gray) Corresponding SI Dimension = J/kg Unit to SI Dimension Factor = 1 Unit = gray Corresponding SI Dimension = J/kg Unit to SI Dimension Factor = 1 Unit = rad Corresponding SI Dimension = J/kg Unit to SI Dimension Factor = 1E-02 Unit = Sv (sievert) Corresponding SI Dimension = Sv Unit to SI Dimension Factor = 1 Unit = sievert Corresponding SI Dimension = Sv Unit to SI Dimension Factor = 1 Unit = rem Corresponding SI Dimension = J/kg Unit to SI Dimension Factor = 1E-02 # Unit = Bq (becquerel) Corresponding SI Dimension = Bq Unit to SI Dimension Factor = 1 Unit = becquerel Corresponding SI Dimension = Bq Unit to SI Dimension Factor = 1 Unit = Ci (curie) Corresponding SI Dimension = s**-1 Unit to SI Dimension Factor = 3.7E+10 Unit = curie Corresponding SI Dimension = s**-1 Unit to SI Dimension Factor = 3.7E+10 Unit = R (Rontgen) Corresponding SI Dimension = C/kg Unit to SI Dimension Factor = 2.58E-04 Unit = Rontgen Corresponding SI Dimension = C/kg Unit to SI Dimension Factor = 2.58E-04 Unit = Roentgen Corresponding SI Dimension = C/kg Unit to SI Dimension Factor = 2.58E-04

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