Stone calculator
Stone to Kg Calculator
Enter stone (and pounds, if you have them) to get the weight in kilograms and pounds.
Your project
Weight in kilograms
79.38
kg
- Kilograms
- 79.38 kg
- Pounds
- 175 lb
- Stone (decimal)
- 12.5 st
- Stone and pounds
- 12 st 7 lb
- US tons
- 0.0875
- Grams
- 79,379 g
One stone is exactly 14 pounds, or 6.35029318 kilograms. The stone is still used for body weight in the UK and Ireland but was removed from trade use in 1985.
The shareable link reopens this calculator with your exact inputs.
The conversion
1 stone = 14 pounds = 6.35029318 kilograms. To go from kilograms to stone, divide by 6.35029. To go from stone to kilograms, multiply by 6.35029. To express a decimal result as stone and pounds, take the whole number of stone and multiply the decimal remainder by 14.
Worked example: 80 kg ÷ 6.35029 = 12.598 stone. The whole part is 12 stone; 0.598 × 14 = 8.4 lb. So 80 kg is 12 st 8 lb, or 176.4 lb.
Why a stone calculator sits on a hardscape site
The word "stone" carries two meanings: the imperial weight unit, and the material a landscape is built from. Both are weight problems, and both are on this site — this page handles the unit, while the stone weight calculator handles the rock.
If you were looking for the weight of actual stone, use the stone weight, granite weight or stone tonnage calculators instead.
Stone to kilograms chart
| Stone | Pounds | Kilograms |
|---|---|---|
| 8 st | 112 lb | 50.8 kg |
| 9 st | 126 lb | 57.2 kg |
| 10 st | 140 lb | 63.5 kg |
| 11 st | 154 lb | 69.9 kg |
| 12 st | 168 lb | 76.2 kg |
| 13 st | 182 lb | 82.6 kg |
| 14 st | 196 lb | 88.9 kg |
| 15 st | 210 lb | 95.3 kg |
| 16 st | 224 lb | 101.6 kg |
| 18 st | 252 lb | 114.3 kg |
| 20 st | 280 lb | 127 kg |
Frequently asked questions
+How many kg in a stone?
6.35029318 kg, which is 14 pounds exactly. For mental arithmetic, 6.35 kg per stone is close enough.
+How do I convert kg to stone and pounds?
Divide the kilograms by 6.35029 to get decimal stone. Keep the whole number as stone, then multiply the decimal part by 14 to get the leftover pounds.
+How many pounds in a stone?
Fourteen, exactly. The stone has been defined as 14 avoirdupois pounds since 1835.
+Is the stone still an official unit?
It is no longer legal for trade in the UK, but it remains in everyday use for body weight in Britain and Ireland. Most of the rest of the world uses kilograms.
+What is 80 kg in stone?
12 st 8.4 lb, or 12.598 stone as a decimal — 176.4 pounds.