Convert Stone (US) to Kilogram
Convert stones (us) to kilograms instantly. 1 stone (us) = 5.669904625 kilogram — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Kilogram to Stone (US) converter for the reverse conversion.
Units explained
Stone (US)
A less common US definition of the stone, about 5.67 kilograms.
A variant stone weight used in some historical US trade.
Rare; appears mainly in historical or specialized contexts.
Derived from older English stone weights that varied by commodity.
Kilogram
The kilogram (kg) is the SI base unit of mass, defined by fixing the Planck constant h at 6.62607015E-34 J s.
From Greek 'khilioi' (thousand) plus 'gramma' (small weight).
The worldwide base unit of mass in science, commerce, and everyday life.
Adopted in 1795; redefined through the Planck constant on 20 May 2019.
Stone (US) to Kilogram conversion formula
The relationship between stones (us) and kilograms:
To convert stones (us) to kilograms, multiply the value in stones (us) by 5.669904625. To reverse, multiply kilograms by 0.1763698097.
How to use this converter
Type a value into the calculator. The result in kilograms updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Kilogram to Stone (US) converter for the reverse direction.
Step-by-step: convert stones (us) to kilograms
- Write down the value in stones (us) (st).
- Multiply that value by the factor 5.669904625.
- The product is the equivalent value in kilograms (kg).
- To reverse, multiply the kilogram value by 0.1763698097.
Worked examples
Example 1 — Convert 1 st to kg:
1 × 5.669904625 = 5.669904625 kg
Example 2 — Convert 100 st to kg:
100 × 5.669904625 = 566.9904625 kg
Real-world example — Maritime depth conversion
A 10-stone (us) sounding depth converts cleanly into kilograms. Recreational divers and sailors translate between the two units whenever they read legacy charts against modern depth-sounder displays.
10 st × 5.669904625 = 56.69904625 kg
Real-world example — Reference scenario in case of fallback
Conversion between human-scale length units is the everyday workflow of architecture, athletics, and apparel design — three of the most common contexts that span metric and imperial systems.
1 st × 5.669904625 = 5.669904625 kg
Real-world example — Adult height conversion
A 1.8-stone (us)-tall person measures a value in kilograms that converts the height to the unit favoured by American forms, schools, or driver's licences. This is daily routine for anyone living between metric and imperial systems.
1.8 st × 5.669904625 = 10.205828325 kg
Stone (US) to Kilogram conversion table
Standard reference values for converting stones (us) to kilograms:
| Stone (US) [st] | Kilogram [kg] |
|---|---|
| 0.01 | 0.0566990463 |
| 0.1 | 0.5669904625 |
| 1 | 5.669904625 |
| 2 | 11.33980925 |
| 3 | 17.009713875 |
| 4 | 22.6796185 |
| 5 | 28.349523125 |
| 10 | 56.69904625 |
| 20 | 113.3980925 |
| 30 | 170.09713875 |
| 40 | 226.796185 |
| 50 | 283.49523125 |
| 100 | 566.9904625 |
| 500 | 2834.9523125 |
| 1000 | 5669.904625 |
Frequently asked questions
How many kilograms is 1 stone (us)?
How do I convert stones (us) to kilograms?
How do I convert kilograms back to stones (us)?
How many kilograms is 100 stones (us)?
Popular weight unit conversions
Convert Stone (US) to other weight units
Show all Stone (US) conversions
Metric / SI (18 units)
Avoirdupois (14 units)
Troy & Apothecary (10 units)
Indian / South Asian (6 units)
Scientific / Atomic (9 units)
Astronomical (4 units)
Biblical / Ancient (14 units)
Sources & references
Conversion factor (1 st = 5.669904625 kg) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
- International Hydrographic Organization — Resolution on the Nautical Mile
International authority that standardised the nautical mile at exactly 1852 m in 1929 — the value adopted worldwide for sea and air navigation.