Automotive Conversion Tables

Sorting out all of those units

Taken from 21st Century Performance, by Julian Edgar

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Length

To convert: to: multiply by:
Inches Millimetres 25.4
Centimetres Inches 0.394
Thousandths of an inch Millimetres 0.0254
Millimetres Thousandths of an inch 39.4
Feet Centimetres 30.5

Mass

To convert: to: multiply by:
Pounds Kilograms 0.454
Kilograms Pounds 2.20

Area

To convert: to: multiply by:
Square inches Square centimetres 6.45
Square centimetres Square inches 0.155
Square feet Square metres 0.093
Square metres Square feet 10.8

Volume & Flow

To convert: to: multiply by:
English gallons Litres 4.55
Litres English gallons 0.220
US gallons Litres 3.79
Litres US gallons 0.264
US gallons English gallons 0.833
English gallons US gallons 1.20
Cubic inches Cubic centimetres 16.4
Cubic centimetres Cubic inches 0.061
Cubic feet Cubic metres 0.0283
Cubic metres Cubic feet 35.3
Cubic feet per minute Cubic metres per hour 1.70
Cubic metres per hour Cubic feet per minute 0.589
Litres per hour English gallons per hour 0.220
English gallons per hour Litres per hour 4.55
Litres per hour US Gallons per hour 0.264
US gallons per hour Litres per hour 3.79
Litres per second Cubic metres per hour 3.60
Cubic metres per hour Litres per second 0.278
Litres per second Cubic feet per minute 2.12
Cubic feet per minute Litres per second 0.472
Litres per second Cubic feet per hour 127
Cubic feet per hour Litres per second 0.00786
Kilograms of air per second Pounds of air per second 2.20
Pounds of air per second Kilograms of air per second 0.0454
Pounds of air per second Kilograms of air per hour 1630
Kilograms of air per hour Pounds of air per second 0.000612
Pounds of air per second Pounds of air per hour 3600
Pounds of air per hour Pounds of air per second 0.000278
Kilograms of air per second Pounds of air per hour 7940
Pounds of air per hour Kilograms of air per second 0.000126

Velocity

To convert: to: multiply by:
Miles per hour Kilometres per hour 1.61
Kilometres per hour miles per hour 0.622
Metres per second Kilometres per hour 3.60
Kilometres per hour Metres per second 0.278
Metres per second Miles per hour 2.24
Miles per hour Metres per second 0.447

Pressure

To convert: to: multiply by:
Pounds per square inch Bar 0.069
Bar Pounds per square inch 14.50
Pounds per square inch Kilopascals 6.90
Kilopascals Pounds per square inch 0.145
Inches of mercury Kilopascals 3.39
Kilopascals Inches of mercury 0.295
Millimetres of mercury Kilopascals 0.133
Kilopascals Millimetres of mercury 7.50
Inches of water Kilopascals 0.248
Kilopascals Inches of water 4.03
Inches of water Pounds per square inch 0.0361
Pounds per square inch Inches of water 27.69
Centimetres of water Kilopascals 0.0976
Kilopascals Centimetres of water 10.2

Power

To convert: to: multiply by:
Horsepower Kilowatts 0.746
Kilowatts Horsepower 1.34
PS (Pferdestarke) Horsepower 0.986
Horsepower PS (Pferdestarke) 1.01
PS (Pferdestarke) Kilowatts 0.735
Kilowatts PS (Pferdestarke) 1.36

Torque

To convert: to: multiply by:
Foot-pounds Newton metres 1.36
Newton metres Foot-pounds 0.738
Kilogram metres Foot pounds 7.23
Foot pounds Kilogram metres 0.138
Kilogram metres Newton metres 9.81
Newton metres Kilogram metres 0.102

Temperature

To convert: to:  :
Degrees Fahrenheit Degrees Celsius Subtract 32 and then multiply by 0.556
Degrees Celsius Degrees Fahrenheit Multiply by 1.8 and then add 32
Kelvin Degrees Celsius Subtract 273.15
Degrees Celsius Kelvin Add 273.15

Fuel Consumption

  Divided by: Equals:
282.48 Miles per English gallon Litres per 100 kilometres
282.48 Litres per 100 kilometres Miles per English gallon
235.21 Miles per US gallon Litres per 100 kilometres
235.21 Litres per 100 kilometres Miles per US gallon

Miscellaneous

To convert: to: multiply by:
Pounds per inch Newtons per millimetre 0.175
Newtons per millimetre Pounds per inch 5.71
Kilograms per millimetre Pound per inch 56.0
Pounds per inch Kilograms per millimetre 0.0179
Metres per second, per second g 0.102
g Metres per second, per second 9.81

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