Stone to KG Converter

About Stone to KG Converter

Weight (technically mass, though used interchangeably in everyday conversion) is measured in metric units (milligrams through metric tons) in most of the world, while the US primarily uses pounds and ounces, and the UK still commonly uses stone for body weight specifically — three overlapping systems that regularly need converting between each other.

This tool converts between seven common units: milligrams, grams, kilograms, and metric tons on the metric side; ounces, pounds, and stone on the imperial/US side. The pound is defined as exactly 0.45359237 kilograms internationally, the precise value this tool uses rather than a rounded 0.454 approximation.

Stone (used primarily in the UK and Ireland for body weight) is less familiar to those outside those regions but converts cleanly — 1 stone equals exactly 14 pounds, or roughly 6.35 kilograms — and this tool handles it alongside the more universally recognized units.

This is useful for cooking and baking with recipes from different countries, tracking body weight across different regional unit conventions, shipping and freight calculations, or any situation needing an exact weight conversion.

How it works

1. Enter a value and select its unit. Any of the seven supported weight units.
2. Select the unit to convert to. Or use the swap button to reverse direction.
3. View the exact result. Plus the value converted into every other supported unit at once.