⚖️ Weight Converter

Stones to Kilograms
( st → kg )

Instantly convert stones to kilograms. Enter any value below and get an accurate result with the full formula and reference table.

Converter Tool
st
kg
Result
1 st = 6.35029318 kg
6.35029318
kg
The Formula
kg = st × 6.35029318
1 stone = 14 pounds = 6.35029318 kilograms exactly. Therefore, kilograms = stones × 6.35029318.

How to Convert Stones to Kilograms

To convert stones to kilograms, multiply the number of stones by 6.35029318. This is because one stone equals 14 pounds, and one pound equals 0.45359237 kilograms.

Step-by-Step Example

Let’s convert 2 stones to kilograms:

1. Multiply by 6.35029318: 2 × 6.35029318 = 12.70058636
2. So 2 st equals 12.70058636 kg.

For a smaller amount, 0.5 st × 6.35029318 = 3.17514659 kg.

When You’d Use Each Unit

Stones are commonly used in the UK and Ireland for measuring body weight. Kilograms are the standard unit of mass in the metric system, used worldwide in science, medicine, and commerce. Converting between them is essential for international health tracking, fitness, and understanding weight in different regions.

Conversion Table

Common stones values converted to kilograms — typical values highlighted.

Stones (st) Kilograms (kg) Scientific Notation
Frequently Asked Questions
How do I convert stones to kilograms quickly? +
Multiply the number of stones by 6.35029318. For example, 3 st × 6.35029318 = 19.05087954 kg. This tool provides the precise value.
How many kilograms are in a stone? +
There are exactly 6.35029318 kilograms in one stone (based on 1 lb = 0.45359237 kg).
What is 1 st in kilograms? +
1 st = 6.35029318 kg.
What is 1 kilogram in stones? +
1 kg ≈ 0.157473 stones.
What is 0.1 st in kilograms? +
0.1 st = 0.635029318 kg.
Can I convert kilograms back to stones with this tool? +
Yes! Just type a value into the kilograms field and the stones field updates automatically. Or use the ⇄ swap button to switch directions.
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