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Conversion Factors

Conversion to SI Units

To convert To Multiply by
bar kilopascal (kPa) 100.0
curie (Ci) gigabecquerel (GBq) 37.00
temperature in degree Fahrenheit (ºF) temperature in degree Celsius (ºC) subtract 32ºF and multiply by 5/9
temperature in degree Celsius (ºC) temperature in Kelvin add 273.15
foot (ft) metre (m) 0.3048
gallon (Imperial) litre(L) 4.546
gallon (US liquid) litre(L) 3.785
inch (in) millimetre (mm) 25.40
kilogram per square centimetre kilopascal (kPa) 98.07
oersted ampere per meter (A/m) 79.58
ounce (avoirdupois) gram (g) 28.35
ounce, fluid (Imperial) millilitre (mL) 28.41
ounce, fluid (US) millilitre (mL) 29.57
pint (Imperial) litre (L) 0.5683
pint (US) litre (L) 0.4732
pound (avoirdupois) Kilogram (kg) 0.4536
pound per square inch (ib/sq.in) Kilopascal (kPa) 6.895
quart (Imperial) litre (L) 1.137
quart (US) litre (L) 0.9464
rad gray (Gy) 0.01000
rem sievert (Sv) 0.01000

Note:
Atmospheric pressure is the pressure exerted by the atmosphere. Gauge pressure is the pressure of a system measured by a gauge, which excludes atmospheric pressure. Absolute pressure is the sum of the available atmospheric pressure and the gauge pressure of the system. Absolute Pressure = Gauge Pressure + Atmospheric Pressure. = 150 psig (gauge pressure) + 14.7 psi (atmospheric pressure) = 164.7 psia, for example.

 

Conversion from SI Units

To convert To Multiply by
ampere per metre (A/m) Oersted 0.01257
temperature in degree Celsius (ºC) temperature in degrre Fahrenheit (ºF) multiply by 9/5 and add 32ºF
temperature in Kelvin temperature in degrre Celsius(ºC) subtract 273.15
gram (g) ounce (avoirdupois) 0.03527
gray (Gy) rad 100.00
kilogram (kg) pound (lb) 2.205
kilopascal (kPa) bar 00.1000
kilopascal (kPa) kilogram per square centimetre (kg/cm2 00.1020
kilopascal (kPa) pound per square inch 0.1450
litre (L) gallon (Imperial) 0.2200
litre (L) gallon (US liquid) 0.2642
litre (L) pint (Imperial) 1.760
litre (L) pint (US) 2.133
litre (L) quart (Imperial) 0.8799
litre (L) quart (US) 1.057
metre (m) foot(ft) 3.281
millilitre (mL) ounce, fluid (Imperial) 0.03520
millilitre (mL) ounce, fluid (US) 0.03381
millimetre (mm) inch (in) 0.03937
sievert (Sv) rem 100.00
terabecquerel (TBq) curie (Ci) 27.03

 

Authorized Equivalents

Volumes
Litres Imperial U.S.
0.5 1 pt 1 pt
1 1 qt 1 qt
2 2 qt 2 qt
2.5 5 pt 5 pt
5 1 gal 1.25 gal
10 2 gal 2.5 gal
15 3 gal 3.75 gal
20 4.25 gal 5 gal
25 5.5 gal 6.25 gal
30 6.5 gal 7.5 gal
42 9 gal 11 gal
50 11 gal 13 gal
60 13 gal 15 gal
100 22 gal 25 gal
120 26 gal 30 gal
120 26 gal 30 gal
220 48 gal 55 gal
220 48 gal 55 gal
250 55 gal 62.5 gal

Note:
Where quantities are specified in SI units of weight, for 500 kg or less, quantities expressed in pounds may be substituted on the basic of 1 kg = 2 lb.