UK Weights and Measures Conversion

Given that you’ll find a mixed system of measurements used when you visit Britain, here are some of the main metric/imperial, imperial/metric conversions.

Length
Imperial to metric
1 inch = 2.5 centimetres
1 foot = 30 centimetres
1 yard = 0.914 metres (914 centimetres)
1 mile = 1.6 kilometres
Metric to imperial
1 centimetre = 0.4 inches
1 metre = 3 feet 3 inches/1.09 yards
1 kilometre = 0.62 miles/1094 yards

Weight
Imperial to metric
1 ounce = 28 grams
1 pound = 454 grams/0.454 kilos
1 stone = 6.36 kilos
Metric to imperial
1 gram = 0.04 ounces
1 kilogram = 2.2 pounds

Volume
Imperial to metric
1 pint = 0.6 litres
1 quart = 1.136 litres/1136 millilitres
1 gallon = 4.6 litres
Metric to imperial
1 litre = 1.76 pint
1 litre = 0.22 gallons

Area
Imperial to metric
1 sq.ft = 0.09 sq.metres
1000 sq.ft = 92.9 sq.metres
1 sq.mile = 2.6 sq.km
Metric to imperial
1 sq.metre = 10.8 sq.ft
1 sq.km = 0.4 sq.mile

Speed
Imperial to metric
1 mph = 1.6 kph
30 mph = 48 kph
50 mph = 81 kph
70 mph = 113 kph
100 mph = 161 kph
Metric to imperial
1 kph = 0.6 mph
30 kph = 18.6 mph
50 kph = 31 mph
100 kph = 62 mph