Convert kg to stone

One kilogram equals 0.157473 stones. To convert any number of kilograms to stones, multiply by 0.15747304.

The converter above works in both directions and updates as you type. Below you will find the formula, a worked example and a reference table of common values.

Weight and mass conversions matter most in three places: shipping, where a rate band can turn on a single kilogram; cooking, where recipes cross between metric grams and imperial ounces; and personal weight, where Britain and Ireland use stones, the United States uses pounds, and everywhere else uses kilograms. Strictly these are mass units rather than weight units, and the distinction only bites in physics, where weight is a force measured in newtons.

kg to stone formula

To go the other way, use kilogram = stone ÷ 0.15747304.

About these units

Since 2019 the kilogram has been defined by the Planck constant rather than a metal cylinder in Paris, making it reproducible in any properly equipped laboratory.

The stone equals 14 pounds and remains in everyday use for body weight in Britain and Ireland, while being essentially unknown elsewhere.

Kilogram is also written kilogramme, kilogrammes, kilograms, kilos, kilo and kgs. Stone is also written stones.

Sources

1. National Bureau of Standards, "Refinement of Values for the Yard and the Pound", Federal Register, 1 July 1959 — the international yard as exactly 0.9144 m and the avoirdupois pound as exactly 0.45359237 kg.