Conversion Tables

These tables and converstion factors are provided to help readers with comparisons between Imperial (UK), US and metric measurements. Please do not use the conversion factors in important technical or safety calculation as they are designed as a guide to converting figures not a definitive listing.

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Speed

miles per hour (mph)kilometre/hour (km/h)
2032
3048
4064
5080
6096
70112
80128
90144
100160

Fuel

gallons (UK)litresgallons (US)litres
14.5513.78
29.0927.54
418.18415.14
627.27622.71
836.37830.28
1045.461037.85
1254.541245.45
1463.641453.00

Weight

poundskilograms
10.454
20.907
31.361
41.814
52.268
104.536
146.350
209.072

Temperature

°C°F
320
405
5010
6015
7020
7525
8530
9535
10540
14060
17580
212100

Metric Conversion

Length
1 millimetre (mm)= 0.0394 ins
1 metre (m) (1,000 mm)= 1.0936 yards
1 kilometre (km) (1,000 m)= 0.0394 ins
1 inch= 25.4 mm
1 yard (36 inches)= 0.9144 m
1 mile (1760 yards)= 1.6093 km
Area
1 square metre (m²) (10,000cm²)= 1.1960 square yards
1 hectare (he) (10,000 m²)= 2.4711 acres
1 square km (km²) (100 hectares)= 0.3851 square mile
1 square yard (9 square feet)= 0.8361 m²
1 acre (4,840 yards²)= 4046.9 m²
Volume
1 cubic metre (m)= 1.3080 cubic yards
1 litre (l)= 0.2200 gallon
1 cubic yard (27 cubic feet)= 0.7646 m
1 pint (4 gills)= 0.5683 litre
1 1 gallon (8 pints)= 4.5401 litres
Heat
1 British Thermal Unit (BTU)= 1055 joules
1 BTU/lb= 2.326 kilojoules/kg
Weight
1 gramme (g) (1000mg)= 0.0353 oz
1 pound (lb) (16 ounces)= 0.4536 kg
1 ton (2240 pounds)= 1.0161 tonnes
1 US ton= 2000 lb
1 metric tonne= 2200 lb
1 hundred weight (cwt)= 112 lb
Power
1 horsepower (hp)= 746 watts (0.75 kW)
1 kilowatt (kW)= 1.35 hp
Pressure
1 bar (atmosphere)= 14.2 psi
1 pound/inch² (psi)= 6895 N/m²
1 (Newton/m²) Nm²= 1 pascal (Pa)
20 lb/in²= 1.41 kg/cm²
USA Wet Measure Equivalents
1 US pint (16 fl oz) (0.8327 UK pt)= 0.4732 litre
1 US gallon (0.3827 UK gal)= 3.7653 litres
1 UK pint= 0.473 litres
1 US barrel= 5.62 ft³ = 0.159 m³