Convert Stone to Tonne
Turn Stones into Tonnes in an instant. Type a value below to get an accurate st → t result, with the formula and a quick-reference table.
1 st = 0.0063502932 t
Quick answer: 1 Stone = 0.0063502932 Tonne
Stone to Tonne conversion table
| Stone (st) | Tonne (t) |
|---|---|
| 1 st | 0.0063502932 t |
| 2 st | 0.012700586 t |
| 5 st | 0.031751466 t |
| 10 st | 0.063502932 t |
| 20 st | 0.12700586 t |
| 50 st | 0.31751466 t |
| 100 st | 0.63502932 t |
| 500 st | 3.1751466 t |
| 1,000 st | 6.3502932 t |
How to convert Stone to Tonne
To convert Stones to Tonnes, multiply the value by 0.0063502932.
- Take your measurement in Stones.
- Multiply it by 0.0063502932 — the number of Tonnes in one Stone.
- The result is the same amount, expressed in Tonnes.
To go the other way, multiply Tonnes by 157.47304 — or simply divide by 0.0063502932.
For example, an average adult, in stone is about 11 st, which is 0.069853225 t.
About Stone and Tonne
A stone is 14 pounds, or about 6.35 kilograms. It is used mainly in the UK and Ireland to express a person's body weight.
A tonne (metric ton) is 1,000 kilograms. It is used for vehicles, freight and industrial quantities.
The Stone is a imperial / US customary unit while the Tonne comes from the metric system — which is exactly why this conversion comes up so often. One Stone equals 0.0063502932 Tonnes.
Other weight & mass conversions
Frequently asked questions
How many Tonnes are in a Stone?
1 Stone equals 0.0063502932 Tonne (st → t). To convert any amount, multiply the number of Stones by 0.0063502932.
How do I convert Stone to Tonne?
Enter the number of Stones in the converter above and read the result in Tonnes. It applies the exact st → t factor instantly, with full precision.
Is the Stone to Tonne converter free?
Yes — it is completely free and unlimited, needs no sign-up, and runs right in your browser, so it is instant and private.
Is the conversion accurate?
Yes. It uses the internationally defined weight & mass factors and full floating-point precision, then rounds the display to a clean, readable number.