Stone to Kilogram Converter
Convert stones to kilograms instantly. Free, bidirectional, and fully in-browser.
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
Open Stone to Kilogram Converter on AltFTool — it loads instantly in your browser.
- 2
Type the value you want to convert into the Stone field.
- 3
Read the equivalent in kilograms in the result field, and copy it if needed.
- 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
How many kilograms are in a stone?
One stone is 6.35029318 kilograms. Multiply the stone value by 6.35029318 to convert. For example, 10 st = 63.5029318 kg.
What is the formula to convert stones to kilograms?
kg = st × 6.35029318. This tool applies it automatically and shows a worked example: 10 st = 63.5029318 kg.
Can it convert kilograms back to stones?
Yes. Press the swap button, or type into the kilogram field, and the tool converts kilograms to stones using the inverse of the same relationship.
Is the conversion accurate?
It uses the standard mass and weight definition (kg = st × 6.35029318), not a rounded approximation, so results are exact to the number of decimal places you select.
Does this work offline and stay private?
Yes. The converter is a browser-side script with no network calls: your values are never uploaded, and once the page has loaded it keeps working without a connection.
Embed this tool on your site
Add the Stone to Kilogram Converter widget to your blog or website — free, responsive, no signup. Just keep the “Widget by AltFTool” credit link visible.
<iframe src="https://www.altftool.com/embed/widget/stones-to-kilograms-converter"
title="Stone to Kilogram Converter — free AltFTool widget"
width="100%" height="640" style="border:0;border-radius:12px;overflow:hidden"
loading="lazy" referrerpolicy="no-referrer-when-downgrade" allow="clipboard-write"></iframe>
<p style="font-size:12px;margin:4px 0 0">Widget by <a href="https://www.altftool.com/tools/all/stones-to-kilograms-converter?utm_source=embed&utm_medium=widget" rel="nofollow">AltFTool — free online tools</a></p>