---
title: "Stone to Tonnes — st to t converter"
description: "1 stone = 0.0063503 tonnes. Convert stone to tonnes with a full conversion table, the exact formula, and a calculator for any value."
url: https://atoneplace.net/convert/stone-to-tonnes/
site: "At One Place"
---

# Stone to tonnes

**1 stone in tonnes: 1 st = 0.0063503 t**

t = st × 0.00635029318

To convert stone to tonnes, multiply by 0.00635029318. The table below gives the values people look up most often, and the converter works for any number.

## Stone to tonnes table

*Common stone values converted to tonnes.*

| Stone | Tonnes |
| --- | --- |
| 1 st | 0.0063503 |
| 2 st | 0.012701 |
| 3 st | 0.019051 |
| 4 st | 0.025401 |
| 5 st | 0.031751 |
| 10 st | 0.063503 |
| 15 st | 0.095254 |
| 20 st | 0.12701 |
| 25 st | 0.15876 |
| 30 st | 0.19051 |
| 40 st | 0.25401 |
| 50 st | 0.31751 |
| 75 st | 0.47627 |
| 100 st | 0.63503 |
| 250 st | 1.587573 |
| 500 st | 3.175147 |
| 1,000 st | 6.350293 |

## How the conversion works

The relationship is t = st × 0.00635029318. Both units measure mass, so the conversion is a fixed factor that never changes. The figure is exact rather than approximate: since the international yard and pound agreement of 1959, an inch is defined as exactly 25.4 millimetres and a pound as exactly 0.45359237 kilograms, and every other imperial and US customary unit here is derived from those two.

> Tonne: Also called a metric ton.

## Common questions

### How many tonnes are in one stone?

One stone equals 0.0063503 tonnes. t = st × 0.00635029318.

### How do you convert stone to tonnes?

Use t = st × 0.00635029318. So 10 st is 0.063503 t.

### How many stone are in one tonne?

One tonne equals 157.473 stone, which is the reverse of the conversion above.

### Is there more than one kind of tonne?

Also called a metric ton.

## Related pages

- [Tonnes to Stone](https://atoneplace.net/convert/tonnes-to-stone/)
- [Stone to Kilograms](https://atoneplace.net/convert/stone-to-kg/)
- [Stone to Grams](https://atoneplace.net/convert/stone-to-grams/)
- [Stone to Milligrams](https://atoneplace.net/convert/stone-to-mg/)
- [Stone to Pounds](https://atoneplace.net/convert/stone-to-lbs/)
- [Stone to Ounces](https://atoneplace.net/convert/stone-to-oz/)

## Sources

- Guide for the Use of the International System of Units (SP 811) — NIST (https://www.nist.gov/pml/special-publication-811) [Public domain (US Government)]
- The International System of Units (SI Brochure) — Bureau International des Poids et Mesures (https://www.bipm.org/en/publications/si-brochure)
- Calculated on this page — At One Place (/about/)