Convert stone to kg

1. How to convert stone to kg

The conversion is a single multiplication: kg = st × 6.35029318. Both units are defined against the same base — the kilogram (kg) — so the factor is fixed and the result is exact to the precision shown.

Worked at the two values people ask for most: 1 st = 6.3502932 kg and 10 st = 63.502932 kg. Going the other way, st = kg × 0.157473044418, so 1 kg = 0.15747304 st — a direction with its own page, kg to stone.

Results are given to eight significant figures. That is more precision than most jobs need — for a rough figure, treat 1 st as about 6.3502932 kg and adjust — but rounding early and multiplying afterwards is how a small error becomes a visible one, so the full figure is what the converter carries.

2. Stone to Kilograms conversion table

Every row is the same factor applied — nothing in the table is a special case, and any value in between behaves the same way. Type your own figure into the converter above and the Formula tile shows the arithmetic being used, so the result is checkable rather than taken on trust.

3. What the two units are

• Stone (st). One st is 6.3502932 kg.
• Kilograms (kg). One kg is 1 kg.

Both are converted through the kilogram (kg): the value is multiplied by its own unit's factor to reach the base, then divided by the target unit's factor to leave it. No direct stone to kg factor has to exist or be kept correct, which is also why the converter can show the same value in all 10 weight & mass units at once.

Weight and mass are treated as one quantity here, as everyday use does. The pound is exactly 0.45359237 kg by definition, so an ounce is exactly a sixteenth of that and a stone exactly fourteen pounds. Watch the tons: a US short ton is 2,000 lb, a UK long ton is 2,240 lb and a tonne is exactly 1,000 kg.

If the pair you actually want is not this one, the full unit converter runs every 10 weight & mass units off the same factor table, along with 11 other categories of measurement.