In the UK and Ireland, body weight is often given in stones and pounds. One stone is 14 lb, about 6.35 kg.
How to use the kg to Stones Converter
- Type the number of kilograms into the Kilograms field. Decimals such as 35 are fine.
- Read the answer in Stone – it updates as you type, with no button to press.
- To convert the other way, type into Stone and the kilograms are recalculated.
- Press Copy results to copy both values with the page title, or Copy link to share this exact conversion.
This page converts only kg ⇄ st. Need a different unit? Use the general weight converter, where you can choose any “from” and “to” unit.
How it works
Both units measure weight, so they are always in the same ratio: one kilogram equals 0.15747304 stone. The calculator multiplies the number of kilograms you type by 0.15747304 to give stone, and when you type into the stone field it divides by the same factor to give kilograms. Because the ratio never changes, doubling the kilograms always doubles the stone. Results are calculated at full precision and rounded only for display (up to eight decimal places, with very large or small values shown in scientific notation).
How to convert kilograms to stone
- Write down the value in kilograms, for example 70 kg.
- Multiply by the conversion factor 0.15747304 (because 1 kilogram = 0.15747304 st).
- 70 × 0.15747304 = 11.023113 st.
- To go back from stone to kilograms, divide by 0.15747304 – or multiply by 6.3502932.
kg to st conversion table
| Kilograms | Stone | Stone | Kilograms |
|---|---|---|---|
| 40 kg | 6.2989218 st | 1 st | 6.3502932 kg |
| 50 kg | 7.8736522 st | 2 st | 12.700586 kg |
| 60 kg | 9.4483827 st | 5 st | 31.751466 kg |
| 63.5 kg | 9.9995383 st | 10 st | 63.502932 kg |
| 70 kg | 11.023113 st | 20 st | 127.00586 kg |
| 76.2 kg | 11.999446 st | 50 st | 317.51466 kg |
| 80 kg | 12.597844 st | 100 st | 635.02932 kg |
| 90 kg | 14.172574 st | 1,000 st | 6,350.2932 kg |
| 100 kg | 15.747304 st | ||
| 120 kg | 18.896765 st |
What is a kilogram?
The kilogram is the SI base unit of mass. Since 2019 it has been defined through the Planck constant rather than a platinum-iridium cylinder kept near Paris.
What is a stone?
The stone is 14 pounds, about 6.35 kg. People in the UK and Ireland still commonly give their body weight in stones and pounds, such as 11 st 4 lb.
Quick mental conversion
For a fast estimate, multiply kilograms by about 0.16 to get stone; the error is about 1.6%. Use the calculator above when you need the exact figure.
Common mistakes to avoid
Confusing fluid ounces (volume) with ounces (weight), using troy ounces for food or regular ounces for gold, and mixing u.s. short tons, uk long tons and metric tonnes.
Stones and pounds
Whole stones are the integer part; multiply the decimal part by 14 to get the remaining pounds. For example 11.02 st = 11 st 0.3 lb.
Formula
1 kg = 0.15747304 st1 st = 6.3502932 kgst = kg × 0.15747304Worked example
Inputs — Kilograms: 70 kg.
Results — Stone = 11.02311311 st.
Frequently asked questions
How many stone is 70 kg?
About 11.02 st (11 st 0.3 lb).
How many kg in a stone?
About 6.35 kg.
How do I convert kilograms to stone?
Multiply the number of kilograms by 0.15747304. For example, 70 kg × 0.15747304 = 11.023113 st.
How do I convert stone back to kilograms?
Divide by 0.15747304 (or multiply by 6.3502932), or simply type the value into the stone field above.
What is 100 kg in stone?
100 kg = 15.747304 st.
What is 50 kg in stone?
50 kg = 7.8736522 st.
Is this conversion exact?
Yes. The factor comes from the official definitions of both units (NIST and the SI), so the only difference you may see is rounding in the last displayed digit.
Can I convert to other units on this page?
This page converts only between kilograms and stone. To pick any weight unit, use the general weight converter linked under Related calculators.
What formula does the kg to Stones Converter use?
1 kg = 0.15747304 st.