How many metric tonnes is 1 stone?

1 stone equals exactly 0.00635029 metric tonnes (or about 6.35 kg). The stone is defined as 14 pounds avoirdupois, and 1 pound = 0.453592 kg, giving 14 × 0.453592 = 6.35029 kg = 0.00635029 t.

What is the difference between a metric tonne and a short ton?

A metric tonne (t) is exactly 1,000 kg. A short ton (used mainly in the US) is 2,000 lb ≈ 907.185 kg. This tool converts to metric tonnes only.

Is the stone still used today?

Yes, the stone remains in everyday use in the United Kingdom and Ireland for measuring body weight, even though metric units are officially standard for most other purposes.

How accurate is this converter?

The conversion uses the exact factor 1 st = 6.35029318 kg, which gives metric tonne results accurate to 8 significant figures — more than sufficient for any practical application.

Can I convert fractional stones, such as 10.5 st?

Yes. The input accepts any positive decimal number, so you can enter values like 10.5 or 3.75 and get a precise result.

Stones to Tonnes Converter

Enter a weight in stones and instantly get the equivalent value in metric tonnes.

Enter Weight

Stones (st)

Metric Tonnes (t)

Result

Stones → Tonnes

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metric tonnes

Kilograms

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Pounds

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Quick Reference — Stones to Tonnes

Stones (st)	Metric Tonnes (t)	Kilograms (kg)

Summary

This tool converts weight values from stones (a traditional British unit equal to 14 pounds) into metric tonnes (1 tonne = 1,000 kg). The conversion is instant, client-side, and requires no server round-trips. It is useful for anyone working across imperial and metric weight systems, particularly in logistics, fitness, and agriculture contexts.

How it works

Enter a weight value in the stones input field.
The tool multiplies your value by 0.00635029 (the exact factor for one stone in metric tonnes).
The result is displayed immediately in metric tonnes.
You can also enter a tonne value to convert back to stones.
Use the swap button to flip the conversion direction.

Use cases

Convert body weight from stones (used in the UK) to metric tonnes for medical or research records.
Check bulk cargo or freight weight stated in stones against metric tonne limits.
Quickly verify unit conversions when reading British nutrition or fitness guides.
Cross-reference agricultural produce weights listed in stones with metric shipping requirements.
Students checking unit conversion homework answers.
Developers testing weight-unit conversion logic in applications.

Frequently Asked Questions

Last updated: 2026-06-04 · Reviewed by Nham Vu