Stone to Tonnes Converter
1 stone = 0.00635029318 tonnes
Distinct from the US short ton (2,000 lb) and the imperial long ton (2,240 lb).
1 stone equals 0.00635029 tonnes
How to convert stone to tonnes
These units measure mass. Pounds and ounces mean avoirdupois unless the unit explicitly says troy; a fluid ounce measures volume and requires a density to relate it to mass.
t = st × 0.00635029318One stone is 0.00635029318 tonnes, so a single multiplication converts any value.
0.0635029 t ≈ 10 × 0.00635029318Distinct from the US short ton (2,000 lb) and the imperial long ton (2,240 lb).
Stone to tonnes conversion table
Common values in stone, converted to tonnes.
| Stone (st) | Tonnes (t) |
|---|---|
| 1 | 0.0063502932 |
| 2 | 0.012700586 |
| 3 | 0.01905088 |
| 4 | 0.025401173 |
| 5 | 0.031751466 |
| 10 | 0.063502932 |
| 20 | 0.12700586 |
| 25 | 0.15875733 |
| 50 | 0.31751466 |
| 100 | 0.63502932 |
| 250 | 1.5875733 |
| 500 | 3.1751466 |
| 1,000 | 6.3502932 |
About these units
stonest
Exactly 14 pounds. Commonly used for body weight in the UK and Ireland.
tonnet
The metric ton: exactly 1,000 kilograms.
Sources and precision
Table results are rounded to 8 significant digits; formula constants may be rounded to 10. Worked example answers use 6 significant digits. The converter starts at 6 significant digits and lets you change display precision. Calculations use the stored factors without intermediate rounding. Exact unit definitions do not make an input measurement more precise; conventional and measured factors follow the assumptions stated here.