How many kilograms are in one stone?

One stone is exactly 6.35029318 kilograms (14 pounds × 0.45359237 kg/lb).

Can I enter decimal stones?

Yes. Enter any decimal number in the Stones field, e.g. 10.5 stones. The Pounds field is optional and additive.

What is the valid range for the Pounds field?

Pounds within a stone range from 0 to 13. The converter accepts any non-negative value, but standard stone-and-pound notation uses 0–13 lb.

Is this converter accurate?

Yes. It uses the internationally defined exact values: 1 lb = 0.45359237 kg and 1 stone = 14 lb = 6.35029318 kg.

Does this tool store my input?

No data is sent to any server. All calculations happen locally in your browser.

Stones to Kilograms Converter

Enter a weight in stones (and optional pounds) to instantly get the equivalent in kilograms.

Enter Weight

Stones

Pounds (optional, 0–13)

Result

Enter a value on the left to see the result.

Common Conversion Reference

Stones	Pounds	Kilograms

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Summary

This converter turns a weight expressed in stones — with an optional additional pounds value — into kilograms. One stone equals exactly 6.35029318 kg, and one pound equals 0.45359237 kg. The result is computed in real time as you type, with no server round-trip.

How it works

Enter the number of stones in the Stones field.
Optionally enter remaining pounds (0–13) in the Pounds field.
The converter multiplies stones by 6.35029318 and pounds by 0.45359237.
The total kilograms is displayed instantly, rounded to 3 decimal places.
Use the Reset button to clear all fields.

Use cases

Convert your body weight from stones to kilograms for a gym or medical form.
Compare weight measurements between UK and metric systems.
Help travellers understand luggage weight limits.
Use in cooking or scientific contexts requiring metric units.
Quickly verify conversion results for school or work assignments.

Frequently Asked Questions

Last updated: 2026-10-05 · Reviewed by Nham Vu