How many grains are in one stone?

Exactly 98,000 grains. This follows from 1 stone = 14 pounds and 1 pound = 7,000 grains (the international standard), so 14 × 7,000 = 98,000.

Is the conversion exact or approximate?

It is exact. All three unit definitions (stone, pound, grain) are fixed by international agreement, so there is no rounding involved in the factor 98,000.

Can I convert grains back to stones?

Yes. Click the swap button (or select the Grains to Stones tab) to reverse the direction. The tool divides grains by 98,000 and shows up to 8 decimal places.

What is a grain as a unit of weight?

A grain (gr) is the smallest unit in the avoirdupois, troy, and apothecary systems. It equals exactly 64.79891 milligrams and is still used for ammunition, gunpowder, and precious metals.

What is a stone as a unit of weight?

A stone (st) is a British imperial unit equal to 14 pounds or about 6.35 kilograms. It is still widely used in the UK and Ireland to express body weight.

Does this tool work offline?

All computation runs in your browser via JavaScript. Once the page is loaded, no internet connection is needed to perform conversions.

Stones to Grains Converter

Enter a weight in stones and instantly get the exact equivalent in grains (1 stone = 98,000 grains).

Stones to Grains

Weight in Stones

Result

Enter a value and click Convert

Common Reference Values

Stones (st)	Pounds (lb)	Grains (gr)

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Summary

This tool converts a weight value expressed in stones to its exact equivalent in grains. The conversion factor is exact: 1 stone equals 98,000 grains, derived from 1 stone = 14 pounds and 1 pound = 7,000 grains. Results are computed instantly in your browser with no server round-trips.

How it works

Enter a weight value in stones in the input field.
The converter multiplies your value by 98,000 to get grains.
The result appears immediately below the input.
Use the swap button to convert grains back to stones.
Copy the result with one click.

Use cases

Verifying weight measurements in historical or imperial unit contexts.
Converting body weight or freight weight between archaic and modern units.
Educational exercises on imperial unit systems.
Pharmaceutical and precious-metal weight calculations requiring grain precision.
Gunpowder and ammunition charge calculations expressed in grains.
Cross-checking kitchen or lab balances that display stones vs. grains.

Frequently Asked Questions

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