KG to stone converter
Kilograms in, stone out, with the answer also read the way people actually say it: stones and pounds.
Guide
How to use it
- Type kilograms on the left. The stone figure appears on the right.
- Read the blue line for the everyday version: whole stones plus pounds.
- Going the other way, type stone on the right (11.5 for eleven and a half stone), or switch the units to pounds for lb-only scales.
Examples
Worked examples
The scales say 82 kg. 82 ÷ 6.35029 = 12.91 stone, which reads as 12 st 12.8 lb, the number your nan asked for.
Aiming for 11 stone means 11 × 6.35029 = 69.85 kg on the app that only speaks metric. Losing 2 lb is 0.91 kg.
Old bathroom scales in stone say 23 kg of luggage is about 3 st 8.7 lb. Same weight, two dialects.
Method
How it works
A stone is 14 pounds and the pound is defined as exactly 0.45359237 kg, making a stone exactly 6.35029318 kg. Kilograms divide by that factor; the stones-and-pounds line takes the whole stones and turns the remainder back into pounds, rounded to one decimal.
All on your device, nothing transmitted, and no account weighing you silently in a database somewhere.
FAQ
Frequently asked questions
How many kg is a stone?
One stone is exactly 6.35029318 kg, which is 14 pounds. So 10 stone is 63.5 kg and 80 kg is about 12 st 8 lb.
How do I read the stones and pounds output?
The whole stones come first, the remainder is shown in pounds out of 14. 75 kg converts to 11.81 stone, which reads as 11 st 11.3 lb.
Why does the UK weigh people in stone?
Habit with deep roots: the 14-pound stone was standardised for trade centuries ago and survived metrication in everyday speech, even though medicine and gyms record kilograms.
What is a healthy weight in stone?
It depends on height, which is what BMI approximates. The BMI calculator in stones takes stones and pounds directly and shows the healthy range for your height.
Does my GP use kg or stone?
NHS records are metric, so kilograms, and scales in surgeries read kg. Staff will usually translate to stone if you ask, or this page does it instantly.
Is the conversion exact?
Yes. The pound is defined as exactly 0.45359237 kg and a stone is 14 of those, so the factor has no rounding in it.
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