How to use this stones and pounds converter
Enter stones and pounds on the left to convert to kilograms, or enter kilograms on the right to convert back to stones and pounds. The result updates immediately, so it is useful when filling out forms, checking a fitness app value or translating a UK body-weight measurement into metric units.
You can use whole stones, decimal pounds or decimal kilograms. The converter is a unit tool only and does not assess whether a body weight is healthy or appropriate.
Why the UK still uses stones
In everyday life, many people in the UK still describe body weight using stones and pounds. In healthcare, fitness apps and international contexts, the same value is usually recorded in kilograms.
This converter helps switch between the two systems quickly without rounding surprises. It is designed for conversion only, not health assessment or medical advice.
Quick reference chart
| Stones & pounds | Total pounds | Kilograms |
|---|---|---|
| 8 st 0 lb | 112 lb | 50.80 kg |
| 9 st 0 lb | 126 lb | 57.15 kg |
| 10 st 0 lb | 140 lb | 63.50 kg |
| 11 st 0 lb | 154 lb | 69.85 kg |
| 12 st 0 lb | 168 lb | 76.20 kg |
| 13 st 0 lb | 182 lb | 82.55 kg |
| 14 st 0 lb | 196 lb | 88.90 kg |
Formulas used
- 1 stone = 14 pounds
- 1 pound = 0.45359237 kilograms
- Total pounds = stones × 14 + pounds
- Kilograms = total pounds × 0.45359237
Common UK body-weight examples
Common checks such as 10 stone in kg, 11 stone in kg, 12 stone in kg and 13 stone in kg are all handled by the same stones-and-pounds formula. Enter the stone value and leave pounds as zero, or add extra pounds for a more precise conversion.
Rounding and accuracy
The calculation uses the exact international pound conversion of 0.45359237 kilograms. Displayed values are rounded for readability, so a long decimal kilogram result may look slightly shorter than the raw mathematical value.
How many kilograms are in one stone?
One stone equals exactly 6.35029318 kilograms.
How many pounds are in one stone?
One stone equals exactly 14 pounds.
Can I convert kilograms back to stones and pounds?
Yes. Enter any kilogram value and the converter will show the equivalent stones, pounds and total pounds instantly.
Who is this converter for?
It is useful for UK users who know body weight in stones and pounds but need kilograms for forms, apps, medical notes, travel documents or international references.
Does this page give medical advice?
No. This is only a unit converter. It does not calculate BMI, diagnose health status or replace medical advice.