Put 24 stones into the exact factor of 6.35029318 and you get 152.4070363 kg. Written out: 24 × 6.35029318 = 152.40703632 kilograms, with no rounding applied until the final display.
At 152.407 kg, BMI works out to 59.5 at 1.60 m, 52.7 at 1.70 m, 47 at 1.80 m and 42.2 at 1.90 m. The healthy band tops out at 25, so the same weight can sit in three different categories depending on height — which is the whole limitation of the index.
The result sits 2.407 kg past 150 kg, so if you need a round figure to quote, 150 kg is the honest nearest one. Plenty of people do this in their head: multiply by 6.4 instead of using the exact factor 6.35029318. At 24 that shortcut gives 153.6 kilograms, off by 1.193 kilograms or about 0.78%. Fine for a rough estimate, not fine for anything you are cutting to size or dosing.
The formula
24 st- The quantity being converted
6.35029318- Exact kilograms in one stone
152.4070363 kg- The converted result
How it works, step by step
- Start with 24 stones.
- Multiply by 6.35029318, the exact number of kilograms in one stone.
- Result: 152.40703632 kilograms.
- Going the other way, divide rather than multiply — 152.4070363 kg ÷ 6.35029318 brings you back to 24 st.
Worked examples
Working it through
24 st × 6.35029318 = 152.40703632 kg. One multiplication, with no rounding until the value reaches the screen.
Proving it both ways
152.4070363 kg ÷ 6.35029318 = 24 st. Recovering the original number is the fastest way to confirm the factor was not applied upside down.
How to read your score
Frequently asked questions
What is 24 stones in kilograms?
24 stones is exactly 152.4070363 kg. Carried to full precision that is 152.40703632 kilograms.
How do you convert stones to kilograms?
One step: multiply the stone figure by 6.35029318. Here that is 24 × 6.35029318 = 152.4070363 kilograms.
What is 152.4070363 kilograms back in stones?
It goes back to 24 stones. The reciprocal of the factor is 0.1574730444, so multiplying by that works just as well as dividing.
How much is 24 st in practice?
At 152.407 kg, BMI works out to 59.5 at 1.60 m, 52.7 at 1.70 m, 47 at 1.80 m and 42.2 at 1.90 m. The healthy band tops out at 25, so the same weight can sit in three different categories depending on height — which is the whole limitation of the index. The reference table shows the values either side of it for comparison.
What is a stone?
Fourteen pounds — still the customary way to state body weight in the UK and Ireland.
What is a kilogram?
The SI base unit of mass, redefined in 2019 in terms of the Planck constant.
24 st in kilograms — nearby values
| Stones | Kilograms | Unrounded |
|---|---|---|
| 18 st | 114.30528 | 114.3052772 |
| 19 st | 120.65557 | 120.6555704 |
| 20 st | 127.00586 | 127.0058636 |
| 21 st | 133.35616 | 133.3561568 |
| 22 st | 139.70645 | 139.70645 |
| 23 st | 146.05674 | 146.0567431 |
| 24 st | 152.40704 | 152.4070363 |
| 25 st | 158.75733 | 158.7573295 |
| 26 st | 165.10762 | 165.1076227 |
| 27 st | 171.45792 | 171.4579159 |
| 28 st | 177.80821 | 177.808209 |
| 29 st | 184.1585 | 184.1585022 |
| 30 st | 190.5088 | 190.5087954 |
Exact factor: 1 stone = 6.35029318 kilograms. The row for 24 st is the value this page is about.