Weight & Mass Converter
Convert weight and mass between kilograms, grams, milligrams and tonnes, and pounds, ounces and stone. Type a value and see it across every unit at once, with exact factors. A free, instant weight converter that runs in your browser.
Turn a weight into the unit you actually need, from kg to lbs, grams to ounces, or pounds to stone. Type one figure and it shows up in every unit at once, so you can weigh out a recipe, log a body weight, or fill in a shipping form without reaching for a calculator. Mass and weight units are handled together, both ways.
- Exact, standard factors
- 100% free
- No sign-up, no app
- Instant as you type
- Works offline after first load
1 kg in every unit
How to use it
- 1
Type a weight
Enter the amount you have, like 5 kilograms or 12 ounces.
- 2
Choose the units
Pick what you are converting from and to, then swap them with one click for the reverse.
- 3
See the rest
Read your value in kilograms, pounds, grams, ounces, stone and tonnes, and copy whichever you need.
When it comes in handy
Cooking and recipes
Convert grams to ounces, or pounds to kilograms, when a recipe uses units your scale does not.
Health and fitness
Switch a body weight between kilograms, pounds and stone, depending on which a chart or app expects.
Shipping and parcels
Convert a package weight to the unit a courier or customs form asks for.
Instant, exact & 100% in your browser
The conversion runs right here in your browser using exact, standard factors. Nothing you type is sent to a server, there is no sign-up and no limit, and once the page has loaded it keeps working even with no connection.
Frequently asked questions
- How many pounds are in a kilogram?
- One kilogram is about 2.20462 pounds, based on the exact definition of a pound as 0.45359237 kilograms. So to go from kilograms to pounds you multiply by roughly 2.205, and to go back you divide by it.
- What is a stone in pounds and kilograms?
- One stone is 14 pounds, which is about 6.35 kilograms. Stone is still widely used for body weight in the UK and Ireland, where a weight is often given as a number of stone plus a number of pounds.
- What is the difference between weight and mass?
- Mass is how much matter something contains and does not change with location; weight is the force gravity exerts on that mass. In everyday use the words are treated as the same thing, and kilograms, grams and pounds all measure mass, which is what this tool converts.
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