Stone to KG Converter

Type a number of stone and this converter shows the answer in kilograms instantly (1 st = 6.35029 kg). Below the converter you will find a ready-made st to kg table, and further down the formula with a worked example.

In the UK and Ireland people usually state their body weight in stone and pounds, such as 11 st 4 lb, while doctors, gyms and the rest of the world use kilograms. Converting is needed for NHS and medical forms, international fitness apps and metric BMI calculators. To convert a stone-and-pounds weight, enter it as decimal stone: 11 st 4 lb is 11 + 4/14 = 11.2857 st, or 71.67 kg.

How to use the Stone to KG tool

1. Enter the value in stone in the Value box. Decimals such as 6 are fine.
2. The result in kilograms appears straight away, rounded to six significant digits.
3. Check the formula line under the result to see exactly how it was calculated.
4. Press ⇄ to convert kilograms back to stone, or pick any other unit from the lists.
5. Use Copy result, or look up common values in the conversion table.

Why use ToolOrca Stone to KG

• Exact factor: 1 st = 6.35029 kg
• Conversion table: st to kg
• Formula and worked example included
• Instant result as you type
• Converts to every other weight unit too
• Free, private and works offline

How to convert stone to kilograms

One stone is 14 pounds, which is exactly 6.35029318 kilograms. The kilogram is the SI base unit of mass, defined since 2019 through the Planck constant. So 1 st = 6.35029318 kg exactly, and 1 kg = 0.157473044 st.

To convert stone to kilograms, multiply the number of stone by 6.35029318.

Worked example: 11 st × 6.35029318 = 69.8532 kg.

Quick mental math for st to kg

Multiply by 6.35, or by 6⅓ for a rough answer: 12 st × 6⅓ = 76 kg (exact 76.2 kg). Each extra pound adds about 0.45 kg.

Need the opposite direction? Use the kilograms to stone converter, or switch units with the ⇄ button above.