Stones to Grams Converter
Convert stones to grams — one stone is exactly 6,350.29318 g. Results update as you type; exact factors shown.
One stone is 6,350.2932 grams — see the exact factor, not a rounded rule of thumb.
How the stones to grams converter works
Mass converts through the kilogram. The avoirdupois pound has been exactly 0.45359237 kg since 1959, so an ounce is 28.349523125 g and a stone (14 lb) is 6.35029318 kg. A US short ton is 2,000 lb; an imperial long ton is 2,240 lb; a metric tonne is 1,000 kg.
The US uses customary units (US gallon, short ton, °F) in daily life; NIST SP 811 gives the exact SI factors.
Common mass conversions
| From | To | Units |
|---|---|---|
| 0.5 st | 3,175.1466 g | stones to grams |
| 1 st | 6,350.2932 g | stone to grams |
| 2 st | 12,700.5864 g | stones to grams |
| 5 st | 31,751.4659 g | stones to grams |
| 8 st | 50,802.3454 g | stones to grams |
| 10 st | 63,502.9318 g | stones to grams |
| 11 st | 69,853.225 g | stones to grams |
| 12 st | 76,203.5182 g | stones to grams |
| 13 st | 82,553.8113 g | stones to grams |
| 14 st | 88,904.1045 g | stones to grams |
| 15 st | 95,254.3977 g | stones to grams |
| 20 st | 127,005.8636 g | stones to grams |
Units in this converter and their exact factors
| Unit | Symbol | One unit in kilograms |
|---|---|---|
| milligram | mg | 0.000001 kilogram |
| gram | g | 0.001 kilogram |
| kilogram | kg | 1 kilogram |
| tonne (metric ton) | t | 1,000 kilogram |
| ounce | oz | 0.0283495231 kilogram |
| pound | lb | 0.45359237 kilogram |
| stone | st | 6.35029318 kilogram |
| US ton (short) | US ton | 907.18474 kilogram |
| imperial ton (long) | long ton | 1,016.0469088 kilogram |
FAQFrequently asked questions about mass conversion
How many grams in a stone?
6,350.29 g, since a stone is 14 pounds.
Where is the stone used?
Body weight in the UK and Ireland. Almost nowhere else, and never in scientific work.
What is 11 stone in kg?
69.9 kg.
Why 14 pounds?
Historical trade convention. Stones of other sizes existed for wool, glass and meat before standardisation in 1835.
What is 1 st in pounds?
Exactly 14.
Where these figures come from
- BIPM — The International System of Units (SI Brochure, 9th edition) — definitions of the base and derived units.
- NIST Special Publication 811 — Guide for the Use of the International System of Units — the exact conversion factors used here.
- National Institute of Standards and Technology (NIST) — United States's national measurement authority.
Last checked: September 2026. Conversion factors are fixed by definition and do not change with tax years or regulations.