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; in3) x 16.387 = Cubic centimetres (cc; cm3) x 0.061 = Cubic inches (cu in; in3)
Imperial pints (Imp pt) x 0.568 = Litres (l) x 1.76 = Imperial pints (Imp pt) Imperial quarts (Imp qt) x 1.137 = Litres (l) 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 (l) x 1.057 = US quarts (US qt) Imperial gallons (Imp gal) x 4.546 = Litres (l) 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 (l) x 0.264 = US gallons (US gal) Mass (weight)
Ounces (oz) x 28.35 = Grams (g) x 0.035 = Ounces (oz) Pounds (lb) x 0.454 = Kilograms (kg) x 2.205 = Pounds (lb) Force
Ounces-force (ozf; oz) x 0.278 = Newtons (N) x 3.6 = Ounces-force (ozf; oz) Pounds-force (lbf; lb) x 4.448 = Newtons (N) x 0.225 = Pounds-force (lbf; lb) 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; lbf/in2; lb/in2) centimetre (kgf/cm2; kg/cm2) (psi; lbf/in2; lb/in2) Pounds-force per square inch x 0.068 = Atmospheres (atm) x 14.696 = Pounds-force per square inch
(psi; lbf/in2; lb/in2) (psi; lbf/in2; lb/in2) Pounds-force per square inch x 0.069 = Bars x 14.5 = Pounds-force per square inch
(psi; lbf/in2; lb/in2) (psi; lbf/in2; lb/in2) Pounds-force per square inch x 6.895 = Kilopascals (kPa) x 0.145 = Pounds-force per square inch
(psi; lbf/in2; lb/in2) (psi; lbf/in2; lb/in2) Kilopascals (kPa) x 0.01 = Kilograms-force per square x 98.1 = Kilopascals (kPa) centimetre (kgf/cm2; kg/cm2) Millibar (mbar) x 100 = Pascals (Pa) x 0.01 = Millibar (mbar) Millibar (mbar) x 0.0145 = Pounds-force per square inch x 68.947 = Millibar (mbar)
(psi; lbf/in2; lb/in2)
Millibar (mbar) x 0.75 = Millimetres of mercury (mmHg) x 1.333 = Millibar (mbar) Millibar (mbar) x 0.401 = Inches of water (inH2O) x 2.491 = Millibar (mbar) Millimetres of mercury (mmHg) x 0.535 = Inches of water (inH2O) x 1.868 = Millimetres of mercury (mmHg) Inches of water (inH2O) x 0.036 = Pounds-force per square inch x 27.68 = Inches of water (inH2O)
(psi; lbf/in2; lb/in2)
Torque (moment of force) Pounds-force inches x 1.152 = Kilograms-force centimetre x 0.868 = Pounds-force inches
(lbf in; lb in) (kgf cm; kg cm) (lbf in; lb in) Pounds-force inches x 0.113 = Newton metres (Nm) x 8.85 = Pounds-force inches (lbf in; lb in) (lbf in; lb in) Pounds-force inches x 0.083 = Pounds-force feet (lbf ft; lb ft) x 12 = Pounds-force inches
(lbf in; lb in) (lbf in; lb in) Pounds-force feet (lbf ft; lb ft) x 0.138 = Kilograms-force metres x 7.233 = Pounds-force feet (lbf ft; lb ft) (kgf m; kg m)
Pounds-force feet (lbf ft; lb ft) x 1.356 = Newton metres (Nm) x 0.738 = Pounds-force feet (lbf ft; lb 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 (mpg) x 0.354 = Kilometres per litre (km/l) x 2.825 = Miles per gallon (mpg)
Temperature
Degrees Fahrenheit = (°C x 1.8) + 32 Degrees Celsius (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 x l/100 km = 282

    See also:

    Sump - removal and refitting
    Note: New gaskets and sealing strips must be used on refitting. Removal 1 Disconnect the battery negative lead. 2 Drain the engine oil. 3 Remove the starter motor as described in Chapter 5, Part ...

    Headlamps and auxiliary lamps - beam alignment
    The headlamps are adjustable individually for both horizontal and vertical alignment from within the engine compartment. The auxiliary lamp adjustment is carried out by slackening the lamp mountin ...

    EEC IV system components - removal and refitting
    Note: Procedures for removal and refitting of the ignition system components and electronic module are given elsewhere in the relevant Sections of this Chapter. Engine coolant temperature sensor ...