Conversion Factors

Conversion Factors

Temperature – C / F

Weight – English/Metric

Pressure – conversion table

Temperature – °C to °F /°F to °C

°C to °F  – Multiply by 9, then divide by 5, then add 32

Example: 20°C x 9 =180
180/5 = 36
36 + 32 = 68°F

°F to °C – Deduct 32, then multiply by 5, then divide by 9

Example: 70°F – 32 = 38
38 x 5 = 190
190/9 = 21.1°C

Weight – Metric to English/English to Metric

English to Metric

1 ounce = 28.3495 grams
1 pound = 453.592 grams
1 English short ton (2,000 lbs.) = 907.185 kilograms
1 Metric ton (2,204 lbs.) = 1,000 kilograms (1 megagram)
1 English long ton (2,240 lbs.) = 1,000 kilograms (1 megagram)
1,000 kilograms (1 megagram) = 1,016 kilograms

Metric to English

1 gram = 0.03527 ounces
1 kilogram (1,000 grams) = 2.2046 pounds
metric ton (1,000 kilograms) = 2,204.6 pounds

English, Imperial, and Standard are interchangeable in this discussion.

For instance,

English to metric – is the same as
Imperial to metric – is the same as
Standard to metric

Pressure

From To Multiply by
Bar Atmosphere 0.9869233
Foot H2O 33.4553
Inch Hg 29.5300
kPa 100
m H2O 10.19176
Millibar 1000
mm Hg 750.062
Pa 1 x 105
Torr 750.062
cm Hg Atmosphere 0.0131579
mm H2O 13.322
Pa 1333.22
cm H2O Atmosphere 9.67841 x 10-4
Millibar 0.980665
mm Hg 0.735559
Pa 98.0665
Ft H2O Atmosphere 0.0294998
Bar 0.0298907
in Hg 0.882671
mm Hg 22.4198
Pa 2989.07
in Hg Atmosphere 0.0334211
foot H2O 1.132925
in H2O 13.5951
Millibar 33.8639
mm H2O 345.316
Pa 3386.39
in H2O in Hg 0.0735559
Millibar 2.49089
mm Hg 1.86832
Pa 249.089
Millibar Pa 100
Pa Atmosphere 9.869233 x 10-6
Bar 1 x 10-5
ft H2O 3.34552 x 10-4
in Hg 2.95300 x 10-4
in H2O 4.01463 x 10-3
Millibar 0.01
mm Hg 7.50062 x 10-3
mm H2O 0.101972
Torr 7.50062 x 10-3
Torr Millibar 1.333224
mm Hg 1
Pa 133.3224