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Convert imperial stone to metric kilograms using the standard definition 1 stone = 14 pounds = 6.35029318 kg. Supports decimal stone for precision.
Quick answer: Stone to KG Converter
Stone↔kg: one stone equals fourteen pounds at standard international kilogram definitions, so multiply or divide by six point three five zero two nine three one eight.
Example: Eleven stone → just under seventy kilograms when you keep four decimal places before rounding to one.
Calculations follow the documented formula on this page; rounding and input units can change the last digit-treat outputs as educational estimates unless you reconcile with source systems.
* This is an estimate. Actual amounts may vary slightly based on input assumptions.
UK and Ireland still discuss body weight in stone; medical and shipping forms often want kilograms - carry extra decimals then round for display per intake rules.
Convert imperial stone to metric kilograms using the standard definition 1 stone = 14 pounds = 6.35029318 kg. Supports decimal stone for precision.
Inputs on this page: Direction, Amount to convert. Assumptions stay visible so you can reproduce the figure elsewhere.
Long-form walkthroughs that pair well with this calculator. When you need narrative context beyond the live fields, start here and return to the tool to plug in your own numbers.
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Read guide →People who care about stone to kg converter use Stone to KG Converter as a planning sandbox: Combine leftover pounds into decimal stone before converting when someone says twelve stone seven.
Continue in the Converters category hub, the Utility tools collection, or the glossary. Related calculators in this session: CM to Feet Converter, KG to LBS Converter, Celsius to Fahrenheit, Feet & Inches to CM Converter, Acres to Hectares Converter, KM to Miles Converter.
The Formula
1 st = 6.35029318 kg via 14 lb at 0.45359237 kg/lb| This tool | 1 st = 6.35029318 kg via 14 lb at 0.45359237 kg/lb |
|---|---|
| Related intent: stone to kg converter | See paired tools for stone to kg converter-each page documents its own core relationship next to the live form. |
| Related intent: kg to stone calculator | See paired tools for kg to stone calculator-each page documents its own core relationship next to the live form. |
Core relationship for Stone to KG Converter:
1 st = 6.35029318 kg via 14 lb at 0.45359237 kg/lb
Worked check: Eleven stone → just under seventy kilograms when you keep four decimal places before rounding to one.
Keep the same assumptions and open a neighbor calculator when your question branches: CM to Feet Converter, KG to LBS Converter, Celsius to Fahrenheit, Feet & Inches to CM Converter. Each page documents its own formula beside the fields.
Learning links: Methodology · Editorial policy · Glossary
Eleven stone → just under seventy kilograms when you keep four decimal places before rounding to one.
Re-enter the same numbers in the calculator above to confirm the page math matches the interactive result.
People who care about stone to kg converter use Stone to KG Converter as a planning sandbox: Combine leftover pounds into decimal stone before converting when someone says twelve stone seven.
Instant response
Run Stone to KG Converter in the browser and read the breakdown beside the form.
Transparent formula
The formula and worked example on this page match what the calculator uses.
Privacy friendly
No account required; inputs stay in your session unless you choose to share them.
Cross-device ready
Layout works on mobile, tablet, and desktop for the same field labels.
Official references for context. Calculator outputs are planning estimates—confirm material decisions with the primary authority or a qualified professional. See our methodology and editorial policy.
Reviewed July 18, 2026 · Content stamp 2026-07-18
Click a question to expand the answer.
Exactly 6.35029318 kg by international agreement (via 14 lb at 0.45359237 kg/lb).
Decimal stone is accepted (e.g., 12.5 st).
Rounding and clothing differences; this is pure unit math.
Stone is primarily UK/Ireland usage; the conversion factor is the same.
Combine pounds with stone manually (st + lb/14) before converting if needed.
Stone↔kg: one stone equals fourteen pounds at standard international kilogram definitions, so multiply or divide by six point three five zero two nine three one eight.
Eleven stone → just under seventy kilograms when you keep four decimal places before rounding to one.
Combine leftover pounds into decimal stone before converting when someone says twelve stone seven. US contexts rarely use stone; pounds-only tools may read more naturally there. Gym scales differ slightly from clinical scales-this is pure unit math, not device calibration.
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Reviewed by Toollabz Editorial
Product editor | Last reviewed July 18, 2026
See methodology and editorial policy.