About this tool

Stone to Kilogram Converter

Convert stones to kilograms instantly. Free, bidirectional, and fully in-browser.

1 stone equals 6.35029318 kilograms — enter any stone value to convert it to kilograms instantly. This Stone to Kilogram converter is a client-side tool: it applies a single multiplication (kg = st × 6.35029318) in your browser, updates the moment you type, and works in both directions — edit either field, or press swap, to convert kilograms back to stones. A reference table lists common stone values already converted, and nothing you enter is sent to a server.

How to use Stone to Kilogram Converter

1. 1

   Open Stone to Kilogram Converter on AltFTool — it loads instantly in your browser.

2. 2

   Type the value you want to convert into the Stone field.

3. 3

   Read the equivalent in kilograms in the result field, and copy it if needed.

4. 4

   Use the decimal-places slider for more or less precision, or press swap to convert kilograms to stones.

Why use Stone to Kilogram Converter

• Instant, both ways

  The result updates as you type, and the swap button flips the conversion to kilogram → stone without reloading.

• Exact Mass math

  The conversion uses the precise factor (kg = st × 6.35029318), so the number matches a manual calculation to the decimal places you choose.

• Adjustable precision

  A slider sets 0–10 decimal places, and very small or very large results switch to scientific notation instead of rounding to zero.

• Private and free

  Everything runs locally in your browser — no upload, no account, no limit on conversions.

Common use cases

• Converting a stone measurement to kilograms for a spec, listing, or report.
• Checking stone↔kilogram figures while comparing products, datasets, or documentation.
• Learning the stone-to-kilogram relationship from the worked formula and the common-value table.

Frequently asked questions