SI Units and Conversion Factors

Length    Volume    Temperature    Mass    Time    Energy    Pressure

 

Length

SI Unit: meter (m)

1 meter = 1.0936 yards

1 centimeter = 0.39370 inch

1 inch = 2.54 centimeters

1 mile = 5280 feet

1 mile = 1.6093 kilometers

 

Volume

SI Unit: cubic meter (m3)

1 liter = 10-3 m3

1 liter = 1.0567 quarts

1 gallon = 4 quarts

1 gallon = 8 pints

1 gallon = 3.7854 liters

1 quart = 32 fluid ounces

1 quart = 0.94635 liter

 

Temperature

SI Unit: kelvin (K)

1 kelvin = 1 Celsius degree

°C = (5/9)(°F - 32)

kelvin temperature = °C + 273.15

 

Mass

SI Unit: kilogram (kg)

1 kilogram = 1000 grams

1 kilogram = mass weighing 2.2046 pounds

1 amu = 1.66057 x 10-27 kilograms

 

Time

SI Unit: second (s)

1 hour = 60 minutes

1 hour = 3600 seconds

 

Energy

SI Unit: joule (J)

1 joule = 1 kg • m2s2 (exact)

1 joule = 0.23901 calorie

1 calorie = 4.184 joules

 

Pressure

SI Unit: Pascal (Pa)

1 atmosphere = 101.3 kilopascals

1 atmosphere = 760 mm Hg (torr)

1 atmosphere = 14.70 pounds per square inch