Stone to Kilogram (st to kg)
Result
6.35029318 Kilogram
Formula
kg = st × 6.35029318
1 st = 6.35029318 kg, and 1 kg = 0.1574730444 st.
The kilogram is the SI base unit of mass, defined through the Planck constant since 2019. The international avoirdupois pound is exactly 0.45359237 kg; the ounce is 1/16 lb and the stone 14 lb.
Worked examples
- 1 st × 6.35029318 = 6.3502932 kg
- 10 st × 6.35029318 = 63.502932 kg
- 11.5 st × 6.35029318 = 73.028372 kg
- 15 st × 6.35029318 = 95.254398 kg
Things to know about st to kg
- One stone is 14 lb, exactly 6.35029318 kg.
- For a weight like 11 st 7 lb, convert to stones first (11 + 7/14 = 11.5 st) or to pounds (161 lb): either way 73.03 kg.
Stone to Kilogram table
| Stone (st) | Kilogram (kg) |
|---|---|
| 1 | 6.3502932 |
| 2 | 12.700586 |
| 5 | 31.751466 |
| 10 | 63.502932 |
| 11.5 | 73.028372 |
| 15 | 95.254398 |
| 20 | 127.00586 |
| 50 | 317.51466 |
| 100 | 635.02932 |
| 1,000 | 6,350.2932 |
The units
- Stone (st)
- 14 pounds, exactly 6.35029318 kg. Used for body weight in the UK and Ireland.
- Kilogram (kg)
- The SI base unit of mass, defined through the Planck constant since May 2019.
Sources for these factors
- The International System of Units (SI Brochure), 9th edition — BIPM
- Handbook 44 (2024), Appendix C: General Tables of Units of Measurement — NIST
- Guide for the Use of the International System of Units (SP 811), Appendix B: conversion factors — NIST
Last reviewed against these sources. An automated check recomputes every factor from its definition on each build. How we check accuracy