Weight Converter

Convert between kilograms, pounds, ounces, grams, stones and tons in an instant. Free, accurate and private — every calculation runs right in your browser.

How to use the weight converter

  1. Enter a value. Type the weight or mass you want to convert into the Value box.
  2. Pick your units. Choose the unit to convert from and the unit to convert to. Press the ⇄ button to swap them.
  3. Read the result. The answer updates instantly, and the table below shows the same amount in every supported weight unit.

About this tool

This free weight converter bridges the metric and imperial systems, so you can switch between grams, kilograms and metric tons or between ounces, pounds, stones and US and imperial tons with no manual arithmetic. It is handy for cooking recipes, shipping and parcel limits, gym and body-weight tracking, science homework, and quick everyday questions like how many pounds are in a kilogram.

Strictly speaking, weight and mass are different physical quantities, but in everyday use people convert between units such as kilograms and pounds as if they were interchangeable, which is exactly what this tool does. It relies on exact definitions — one pound is 0.45359237 kilograms and one ounce is one-sixteenth of a pound — and runs entirely in your browser, so your numbers are never uploaded and stay private.

Frequently asked questions

How many pounds are in a kilogram?

One kilogram equals about 2.20462 pounds. To convert kilograms to pounds, multiply by 2.20462; to convert pounds to kilograms, multiply by 0.45359237.

What is a stone in pounds?

One stone equals exactly 14 pounds, or about 6.35 kilograms. Stones are commonly used to describe body weight in the UK and Ireland, and this converter supports them directly.

What is the difference between a US ton and an imperial ton?

A US (short) ton is 2,000 pounds, about 907.18 kg, while an imperial (long) ton is 2,240 pounds, about 1,016.05 kg. A metric ton is a separate unit equal to 1,000 kg. All three are included.

Is my data sent anywhere?

No. All conversions are performed locally in your browser with JavaScript. Nothing you enter is transmitted or stored, so your data stays private.