Conversion Tables by Haynes

Length (distance)
Inches (in)x25.4= Millimetres (mm)x0.0394= Inches (in)
Feet (ft)x0.305= Metres (m)x3.281= Feet (ft)
Milesx1.609= Kilometres (km)x0.621= Miles
Volume (capacity)
Cubic inches (cu in; in³)x16.387= Cubic centimetres (cc; cm²)x0.061= Cubic inches (cu in; in³)
Imperial pints (Imp pt)x0.568= Litres (l)x1.760= Imperial pints (Imp pt)
Imperial quarts (Imp qt)x1.137= Litres (l)x0.88= Imperial quarts (Imp qt)
Imperial quarts (Imp qt)x1.201= US quart (US qt)x0.833= Imperial quarts (Imp qt)
US quarts (US qt)x0.946= Litres (l)x1.057= US quarts (US qt)
Imperial gallons (Imp gal)x4.546= Litres (l)x0.22= Imperial gallons (Imp gal)
Imperial gallons (Imp gal)x1.201= US gallons (US gal)x0.833= Imperial gallons (Imp gal)
US gallons (US gal)x3.785= Litres (l)x0.264= US gallons (US gal)
Mass (weight)
Ounces (oz)x28.35= Grams (g)x0.035= Ounces (oz)
Pounds (lb)x0.454= Kilograms (kg)x2.205= Pounds (lb)
Force
Ounces-force (ozf)x0.278= Newtons (N)x3.6= Ounces-force (ozf)
Pounds-force (lbf)x4.448= Newtons (N)x0.225= Pounds-force (lbf)
Newtons (N)x0.1= Kilograms-force (kgf; kg)x9.81= Newtons (N)
Pressure
PSI; lbf/in²x0.070= kgf/cm²; kg/cm²x14.223= PSI; lbf/in²
PSI; lbf/in²x0.068= Atmospheres (atm)x14.696= PSI; lbf/in²
PSI; lbf/in²x0.069= Barsx14.5= PSI; lbf/in²
PSI; lbf/in²x6.895= Kilopascals (kPa)x0.145= PSI; lbf/in²
Kilopascals (kPa)x0.01= kgf/cm²; kg/cm²x98.1= Kilopascals (kPa)
Torque
Pounds-force inch (lbf/in)x1.152= kgf cm; kg cmx0.868= Pounds-force inch (lbf/in)
Pounds-force inch (lbf/in)x0.113= Newton metres (Nm)x8.85= Pounds-force inch (lbf/in)
Pounds-force inch (lbf/in)x0.083= lbf ft; lb ftx12= Pounds-force inch (lbf/in)
Pounds-force feet (lbf/ft)x0.138= kgf m; kg mx7.233= Pounds-force feet (lbf/ft)
Pounds-force feet (lbf/ft)x1.356= Newton metres (Nm)x0.738= Pounds-force feet (lbf/ft)
Newton metres (Nm)x0.102= kgf m; kg mx9.804= Newton metres (Nm)
Power
Horsepower (hp)x745.7= Watts (W)x0.0013= Horsepower (hp)
Velocity (speed)
Miles per hour (mph)x1.609= Kilomtres per hour (kph)x0.621= Miles per hour (mph)
Fuel consumption*
mpg (imperial)x0.354= Kilometres per litre (km/l)x2.825= mpg (imperial)
mpg (US)x0.425= Kilometres per litre (km/l)x2.352= mpg (US)
Temperature
Degrees Fahrenheit (°F)=(°C x 1.8) + 32
Degrees Celcius (Degrees Centigrade; °C)=(°F – 32) x 0.56
 
* It is common practice to convert from miles per gallon (mpg) to litres/100 kilometres (l/100km), where mpg (Imperial) x l/100 km = 282 and mpg (US) x l/100 km = 235.
©2003 Haynes Publishing
©2003 Haynes Publishing

Special thanks to Haynes Publishing for their kind permission to reproduce these tables.

©2003 Haynes Publishing