Weight & Mass
Convert kilograms, grams, pounds, ounces, stone, tonnes, carats, tola and more — with stone + pounds and every unit at once.
- Your data never leaves your device
- 100% free
- No sign-up
- Works offline after first load
How to convert weight and mass
- Pick the category and the units to convert from and to.
- Type the value — the result and every other unit appear instantly.
- Swap, convert a list, copy or share the result.
About Weight & Mass
Convert kilograms, grams, pounds, ounces, stone, tonnes, carats, tola and more — with stone + pounds and every unit at once. The result updates as you type.
Every unit of the category is listed at once, a chart shows common values, and you can swap units, pick the precision or scientific notation, convert a whole list, and share or print the result.
Good for
- Quick everyday conversions
- Engineering, science and homework
- Travel, cooking and shopping
Tip: Use the precision setting to get exactly the number of decimals you need.
Frequently asked questions
Which units are included?
All common metric, imperial and US units for this category, plus Indian units like tola, quintal and bigha — open the From and To lists, or change the category to convert anything else.
Can I see all units at once?
Yes — the result is shown in every unit of the category below the main answer.
Can I convert a list of numbers?
Yes, choose “Convert a list” and paste one value per line.
Can it show stone and pounds?
Yes — weights are also shown as stone + pounds and pounds + ounces, the way UK bathroom scales and US recipes show them.
How many pounds are in a stone?
One stone is 14 pounds, or about 6.35 kg.