Mass Converter
Convert between metric and imperial mass units instantly, including stone and pounds used in the UK. Type any value to update all fields simultaneously.
Common Mass Conversions
How many kilograms in a stone?
1 stone equals 6.35029 kilograms (exactly 14 pounds). Stone is still widely used in the UK for body weight. To convert stone to kg, multiply by 6.35. So 10 stone = 63.5 kg, 11 stone = 69.85 kg, and 12 stone = 76.2 kg.
How many pounds in a kilogram?
1 kilogram equals approximately 2.20462 pounds. To convert kg to pounds, multiply by 2.205. Going the other way, multiply pounds by 0.4536 to get kilograms. A 70 kg person weighs about 154 lbs (or just over 11 stone).
What is the difference between a metric tonne and an imperial ton?
A metric tonne (t) is exactly 1,000 kg. A UK long ton (imperial ton) is 2,240 pounds = 1,016.05 kg — about 1.6% heavier than a metric tonne. A US short ton is 2,000 pounds = 907.18 kg. In everyday UK usage, "tonne" almost always means the metric tonne.
How many ounces in a pound?
There are exactly 16 avoirdupois ounces in 1 pound. 1 ounce = 28.3495 grams. Note: troy ounces (used for precious metals like gold) are heavier — 1 troy ounce = 31.1035 grams = 1.09714 avoirdupois ounces.
How do I convert stone and pounds to kilograms?
Convert stone and pounds to total pounds first, then multiply by 0.4536. Example: 11 stone 6 lbs = (11 × 14) + 6 = 160 lbs. Then 160 × 0.4536 = 72.6 kg. Or use the converter above — type your stone value, note the kg result, then add the remaining pounds converted separately.