About the KG to Stone
This kg to stone converter turns a weight in kilograms into stones and pounds — the format still used for body weight in the UK and Ireland — as well as decimal stones and total pounds. Enter any weight and you get an answer such as "11 st 0.3 lb", ready to compare with an old set of bathroom scales, an NHS leaflet or a boxing weigh-in.
It is useful when a doctor, gym or app records your weight in kilograms but you think in stones, when you are following a UK diet plan, or when you are comparing weights from different countries. The reference table lists common body weights from 50 kg to 120 kg.
The conversion is exact: a pound is defined as 0.45359237 kg and a stone is 14 pounds, so 1 stone = 6.35029318 kg. The leftover pounds are rounded to one decimal place and carried into the next stone when they reach 14.
How to use the kg to stone
- 1Enter your weight in kilograms.
- 2Read the stones-and-pounds result, e.g. 11 st 0.3 lb.
- 3Use decimal stones or total pounds if a form asks for them.
- 4Scan the table for other common body weights.
Formula and method
First the weight is converted to pounds by dividing by 0.45359237, the exact number of kilograms in an international pound. Dividing the pounds by 14 gives decimal stones; the whole-number part is the stones and the remainder (pounds minus 14 × stones) is the extra pounds.
Equivalently, stones = kg ÷ 6.35029318. The remaining pounds are rounded to one decimal place, and if rounding pushes them to 14 they are carried into an extra stone so the result never reads "13 st 14 lb".
- kg
- Weight in kilograms
- lb
- Weight in pounds (1 lb = 0.45359237 kg)
- st
- Stones (1 st = 14 lb = 6.35029318 kg)
Worked examples
70 kg in stones
70 ÷ 0.45359237 = 154.32 lb. 154.32 ÷ 14 = 11 stones with 0.32 lb left over, so 70 kg is 11 st 0.3 lb (11.02 decimal stones).
95 kg in stones and pounds
95 kg is 209.44 lb. Fourteen stones account for 196 lb, leaving 13.44 lb, so the answer is 14 st 13.4 lb — just under 15 stone.
57.5 kg in stones
57.5 ÷ 0.45359237 = 126.77 lb. 9 stones is 126 lb, leaving 0.77 lb, which rounds to 9 st 0.8 lb.
Frequently asked questions
How many kg are in a stone?+
One stone is exactly 6.35029318 kg, because a stone is 14 pounds and a pound is defined as 0.45359237 kg.
How do I convert kg to stones and pounds?+
Divide the kilograms by 0.45359237 to get pounds, then divide by 14. The whole number is stones; the pounds left over (total pounds minus 14 × stones) are the extra pounds. For 80 kg: 176.37 lb = 12 st (168 lb) + 8.4 lb, so 12 st 8.4 lb.
What is 100 kg in stone?+
100 kg is 220.46 lb, which is 15 stone 10.5 pounds, or 15.75 decimal stones.
Who still uses stones?+
Stones are mainly used for body weight in the United Kingdom and Ireland. Medical records there are now in kilograms, but many people still describe their weight in stones and pounds.
Is a decimal stone the same as stones and pounds?+
No. 11.5 stone means eleven and a half stones, which is 11 st 7 lb, not 11 st 5 lb. Multiply the decimal part by 14 to get pounds.