Conversion factors
Length (distance)
Inches (in) X 25.4 = Millimetres (mm) X 0.0394 = Inches (in)
Feet (ft) X 0.305 = Metres (m) X 3.281 = Feet (ft)
Miles X 1.609 = Kilometres (km) X 0.621 = Miles
Volume (capacity)
Cubic inches (cu in; in
3
) X 16.387 = Cubic centimetres (cc; cm
3
) X 0.061 = Cubic inches (cu in; in
3
)
Imperial pints (Imp pt) X 0.568 = Litres (I) X 1.76 = Imperial pints (Imp pt)
Imperial quarts (Imp qt) X 1.137 = Litres (I) X 0.88 = Imperial quarts (Imp qt)
Imperial quarts (Imp qt) X 1.201 = US quarts (US qt) X 0.833 = Imperial quarts (Imp qt)
US quarts (US qt) X 0.946 = Litres (I) X 1.057 = US quarts (US qt)
Imperial gallons (Imp gal) X 4.546 = Litres (I) X 0.22 = Imperial gallons (Imp gal)
Imperial gallons (Imp gal) X 1.201 = US gallons (US gal) X 0.833 = Imperial gallons (Imp gal)
US gallons (US gal) X 3.785 = Litres (I) X 0.264 = US gallons (US gal)
Mass (weight)
Ounces (oz) X 28.35 = Grams (g) X 0.035 Ounces (oz)
Pounds (Ib) X 0.454 = Kilograms (kg) X 2.205 = Pounds (Ib)
Force
Ounces-force (ozf; oz) X 0.278 = Newtons (N) X 3.6 = Ounces-force (orf; oz)
Pounds-force (Ibf; Ib) X 4.448 = Newtons (N) X 0.225 = Pounds-force (Ibf; Ib)
Newtons (N) X 0.1 = Kilograms-force (kgf; kg) X 9.81 = Newtons (N)
Pressure
Pounds-force per square inch X 0.070 = Kilograms-force per square X 14.223 = Pounds-force per square inch
(psi; Ibf/in
2
; Ib/in
2
) centimetre (kgf/cm
2
; kg/cm
2
) (psi; Ibf/in
2
; Ib/in
2
)
Pounds-force per square inch X 0.068 = Atmospheres (atm) X 14.696 = Pounds-force per square inch
(psi; Ibf/in
2
; Ib/in
2
) (psi; Ibf/in
2
; Ib/in
2
)
Pounds-force per square inch X 0.069 = Bars X 14.5 = Pounds-force per square inch
(psi; Ibf/in
2
; Ib/in
2
) (psi; Ibf/in
2
; Ib/in
2
)
Pounds-force per square inch X 6.895 = Kilopascals (kPa) X 0.145 = Pounds-force per square inch
(psi; Ibf/in
2
; Ib/in
2
) (psi; Ibf/in
2
; Ib/in
2
)
Kilopascals (kPa) X 0.01 = Kilograms-force per square X 98.1 = Kilopascals (kPa)
centimetre (kgf/cm
2
; kg/cm
2
)
Torque (moment of force)
Pounds-force inches X 1.152 = Kilograms-force centimetre X 0.868 = Pounds-force inches
(Ibf in; Ib in) (kgf cm; kg cm) (Ibf in; Ib in)
Pounds-force inches X 0.113 = Newton metres (Nm) X 8.85 = Pounds-force inches
(Ibf in; Ib in) (Ibf in; Ib in)
Pounds-force inches X 0,083 = Pounds-force feet (Ibf ft; Ib ft) X 12 = Pounds-force inches
(Ibf in; Ib in) (Ibf in; Ib in)
Pounds-force feet (Ibf ft; Ib ft) X 0.138 = Kilograms-force metres X 7.233 = Pounds-force feet (Ibf ft; Ib ft)
(kgf m; kg m)
Pounds-force feet (Ibf ft; Ib ft) X 1.356 = Newton metres (Nm) X 0.738 = Pounds-force feet (Ibf ft; Ib ft)
Newton metres (Nm) X 0.102 = Kilograms-force metres X 9.804 = Newton metres (Nm)
(kgf m; kg m)
Power
Horsepower (hp) X 745.7 = Watts (W) X 0.0013 = Horsepower (hp)
Velocity (speed)
Miles per hour (miles/hr; mph) X 1.609 = Kilometres per hour (km/hr; kph) X 0.621 = Miles per hour (miles/hr; mph)
Fuel consumption*
Miles per gallon, Imperial (mpg) X 0.354 = Kilometres per litre (km/I) X 2.825 = Miles per gallon, Imperial (mpg)
Miles per gallon, US (mpg) X 0.425 = Kilometres per litre (km/I) X 2.352 = Miles per gallon, US (mpg)
Temperature
Degrees Fahrenheit = (°C x 1.8) + 32 Degrees Celsius (Degrees Centigrade; °C) = (°F - 32) x 0.56
*lt is common practice to convert from miles per gallon (mpg) to litres/100 kilometres (1/100km),
where mpg (Imperial) x 1/100 km = 282 and mpg (US) x 1/100 km = 235
