Weight Converter
Convert pounds, kilograms, ounces, grams, and stones.
- kg
- lb
- mass
About Weight Converter
Weight (technically mass for most everyday purposes) gets measured in different units depending on where you are and what you're weighing. Kitchens in metric countries use grams and kilograms; American recipes call for ounces and pounds; British people often give their body weight in stones; freight is measured in tonnes (metric), short tons (US), or long tons (UK), each slightly different from the others.
This converter handles all of the common units at once. Enter a single value and see it expressed in every other unit, so you can read off a kilogram-to-pound conversion or a tonne-to-US-ton conversion without picking the right pair from a dropdown. The conversions use exact internationally-agreed factors, so the values match what you'll find in a textbook or a customs declaration.
How to use
Type a value into the input at the top and pick the unit from the dropdown beside it. The conversions panel below lists the same value expressed in every other unit — kilograms, grams, milligrams, tonnes, pounds, ounces, stones, US tons, and UK tons — with a copy button on each row.
To switch the input unit, you can either change the dropdown directly or tap a row in the conversions list — that row becomes the new input. The URL updates with each change so you can bookmark or share a specific conversion.
Frequently asked questions
How many pounds is one kilogram?
One kilogram is approximately 2.20462 pounds. Conversely, one pound is 0.45359237 kilograms — that's the exact internationally-agreed definition since 1959, so the conversion is not an approximation but a fixed factor.
How many stones is one kilogram?
One stone equals 14 pounds (6.35029318 kg). So one kilogram is about 0.1575 stones, and someone who weighs 70 kg is roughly 11 stone — handy for filling in British forms or talking to a grandparent who still thinks in stones.
What's the difference between a US ton and a UK ton?
A US "short ton" is 2,000 pounds (about 907 kg). A UK "long ton" is 2,240 pounds (about 1,016 kg). The metric "tonne" is 1,000 kilograms (about 2,205 pounds), which is closer to the long ton. These three are all called "ton" colloquially, so always check which one a quote or freight document means.
Is weight the same as mass?
In strict physics, no — mass is intrinsic to an object, weight is the force gravity exerts on it, and on the Moon you'd weigh a sixth of what you do on Earth despite having the same mass. In everyday use, "weight" and the units here (kilograms, pounds, etc.) all refer to mass, which is what gets converted.