Stones to Kilograms

Updated: July 25, 2026 · Source: NIST Guide to the SI, Appendix B (Authoritative SI and U.S. customary conversion-factor reference.)

Methodology·How We Verify

Snapshot

1 stone equals exactly 6.35029318 kilograms. Conversion Encyclopedia uses the same fixed conversion basis across the calculator, common values, and reverse page for this page.

Reference basis: Multiply stone by 6.35029318 to obtain kilograms.
Example: For 10 stone, the result is 63.5029318 kilograms.
Source basis: NIST Guide to the SI, Appendix B.

Use the interactive calculator below for custom values and the common-value table for quick checks.

Converter Calculator

6.35 Kilograms

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Explanation

Use this page when you want a direct Stones to Kilograms conversion. On this page, 1 Stone equals 6.35 Kilograms.

This route uses exact modern mass definitions, so the direct answer, calculator, table, and FAQ stay aligned for Stones to Kilograms.

Stones (st): a British imperial mass unit equal to 14 pounds, often used for body-weight reporting.

Kilograms (kg): the SI base unit of mass, used as the common reference for modern metric and cross-system weight conversions.

This route is useful when translating mass values across metric and imperial conventions so packaging, shipping, industrial, and everyday references stay comparable.

This conversion is purely multiplicative because both units reduce through kilograms using fixed mass definitions with no offset.

Conversion Basis

Multiply stone by 6.35029318 to obtain kilograms.
For 10 stone, the result is 63.5029318 kilograms.
The snapshot, calculator, common values, and reverse route use the same conversion basis.
Source: NIST Guide to the SI, Appendix B (Authoritative SI and U.S. customary conversion-factor reference.)

Reference & Scope

The conversion uses 14 avoirdupois pounds per stone and the exact international pound-to-kilogram definition.

Values are calculated from one explicit conversion basis.
Displayed results are rounded only after the underlying calculation.
Real measured materials and ingredients can vary from the stated reference basis.
Source: NIST Guide to the SI, Appendix B (Authoritative SI and U.S. customary conversion-factor reference.)

Common Conversion Values

Stones	Kilograms
1	6.35
5	31.751
8	50.802
9	57.153
10	63.503
11	69.853
12	76.204
14	88.904

Frequently Asked Questions

What is 1 stone in kilograms?

1 Stone equals 6.35 Kilograms on this page.

What definition does this Stones to Kilograms page use?

This route uses exact modern mass definitions anchored to the kilogram, so the factor stays consistent across the direct answer, calculator, table, and FAQ.

Is there a reverse Kilograms to Stones page?

Use the mirror Kilograms to Stones page to switch the direction while keeping the same fixed mass definitions.