How many grams are in one stone?

One stone equals exactly 6350.29318 grams (14 pounds × 453.59237 g/lb).

How many grams are in one pound?

One pound equals exactly 453.59237 grams by international definition.

What is the maximum number of pounds I can enter?

Because one stone equals 14 pounds, the pounds field accepts values from 0 to 13. If you have 14 or more pounds, add one to the stone count instead.

Can I convert a fractional number of stones directly?

Yes. Enter the whole stone count in the Stones field and leave Pounds at 0, or use the Pounds field for the sub-stone portion. For example, 10 stone 7 lb = 66,678.08 g.

Is the conversion accurate enough for scientific use?

The tool uses the internationally agreed exact definition of the pound (453.59237 g), so results are accurate to seven significant figures — suitable for most practical purposes.

Stones to Grams Converter

Enter a weight in stones (and optional pounds) and get the exact equivalent in grams.

Enter Weight

Stones (st)

Pounds (lb) — optional, 0–13

Quick Reference

1 stone6,350.29 g

1 pound453.59 g

1 stone = 14 lb= 6.350 kg

Result

Enter a weight on the left to see the result

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Summary

This tool converts a weight expressed in stones (st) — and an optional fractional pounds component — into grams (g). One stone equals exactly 14 pounds, and one pound equals 453.59237 grams, giving a stone value of 6350.29318 grams. The conversion is performed entirely in your browser with no data sent to any server.

How it works

Enter the number of stones in the "Stones" field.
Optionally enter additional pounds (0–13) in the "Pounds" field.
The result in grams updates instantly as you type.
Use the Copy button to copy the gram value to your clipboard.
Switch the result display between grams, kilograms, and milligrams with the unit toggle.

Use cases

Convert UK body-weight measurements into grams for dietary tracking apps.
Translate stone-based package weights into metric units for international shipping.
Compare ingredient weights listed in British recipes against metric scales.
Verify luggage weight allowances expressed in stones against gram limits.
Convert historical stone measurements found in old documents into metric values.
Help students practise imperial-to-metric weight conversions.

Frequently Asked Questions

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