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Weight Calculator

Convert weights and work in stones, pounds and ounces.

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Convert a weight

Stones and pounds

Body weight, the way it is still quoted in Britain and Ireland.

Stones and pounds

Three different tons

A metric tonne is 1,000 kg, a US short ton is about 907 kg, and a UK long ton is about 1,016 kg. They are listed separately above.

Quick Tool Overview

The Weight Calculator converts a weight into every other unit at once — grams, kilograms and tonnes alongside ounces, pounds, stones and both US and metric tons — with a dedicated stones-and-pounds panel and a clear distinction between the tons that share a name.

What it does
Converts weights across every metric and imperial unit
You give it
A weight in any unit
You get back
The full conversion table, including stones and pounds
Best for
Body weight, cooking, shipping and freight
Calculators Free, unlimited use No sign-up Runs in your browser

About the Weight Calculator

Enter a weight in any unit and see it in all the others at once: grams, kilograms and tonnes alongside ounces, pounds, stones and both the US and metric ton. One entry fills the whole table, in either direction.

Stones and pounds get their own panel because body weight is still quoted that way in Britain and Ireland, and the conversion is genuinely awkward: a stone is 14 pounds, so 11 stone 4 is 158 pounds or about 71.7 kilograms. The calculator also distinguishes the tons that share a name, since a metric tonne, a US short ton and a UK long ton are three different weights.

Key features of the Weight Calculator

One entry fills the table

Enter a weight in any unit and see it in all the others, in either direction.

Stones and pounds panel

Body weight is still quoted that way in Britain and Ireland, and a stone being 14 pounds makes it genuinely awkward — 11 stone 4 is 158 pounds, or about 71.7 kg.

Three different tons

A metric tonne, a US short ton and a UK long ton are distinguished rather than conflated.

Cooking-scale precision

Grams and ounces are given to enough decimal places to be useful in a kitchen.

Instant conversion

Results update as you type, with nothing to submit.

How to use the Weight Calculator

  1. 1

    Enter a weight

    Type a value in whichever unit you have and the rest of the table fills in.

  2. 2

    Use the stones panel

    Enter stones and pounds together to convert body weight to or from kilograms.

  3. 3

    Check which ton you mean

    Metric, short and long tons are listed separately because they are different weights.

Frequently asked questions

About 2.20462. A pound is defined as exactly 0.45359237 kilograms, so the conversion is exact rather than approximate.

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