Unit Converter

Common UK conversions

• Length: 1 mi = 1.609 km; 1 ft = 12 in; 1 yd = 3 ft; 1 m ≈ 3.2808 ft.
• Weight: 1 stone = 14 lb = 6.35029 kg; 1 lb = 16 oz = 0.4536 kg; 1 tonne = 1,000 kg.
• Volume (imperial): 1 imperial pint = 568.26 mL; 1 imperial gallon = 8 pints = 4.54609 L; 1 imperial fl oz = 28.413 mL.
• Temperature: °C = (°F − 32) × 5/9; K = °C + 273.15.
• Data: based on 1 KB = 1,024 bytes (binary).

The UK is mostly metric but keeps miles, stones and imperial pints and gallons. Volume here uses imperial measures, not US ones. All conversions run locally in your browser.

Frequently Asked Questions

How many kilograms are in a stone?

1 stone = 14 pounds = 6.35029 kilograms. So 11 stone ≈ 69.85 kg. The stone is still widely used in the UK for body weight.

How big is an imperial pint?

An imperial pint is 568.26125 mL — noticeably larger than the US pint of 473 mL. This is the pint used for milk and draught beer in the UK.

How many litres are in an imperial gallon?

The imperial gallon is 4.54609 litres, compared with the US gallon of 3.78541 litres. The imperial gallon is about 20% larger.

How do I convert miles to kilometres?

1 mile = 1.609344 km, and 1 km ≈ 0.62137 miles. The UK still uses miles for road distances and speed limits.