Weight / Mass Converter
Convert weight and mass between the units you actually use every day: grams, kilograms, metric tonnes, ounces, pounds, and stones. Whether you are reading a recipe from another country, checking a parcel against a shipping limit, tracking body weight, or converting a lab figure, this tool gives an instant answer with exact definitions built in (one pound is exactly 0.45359237 kilograms). Choose your source and target units, type a number, and watch the converted value update live as you type. It is a fast, no-nonsense replacement for looking factors up by hand. All calculations happen locally in your browser, so nothing you enter is uploaded and the tool keeps working even without a connection.
How to use Weight / Mass Converter
- Type a value into the unit you have.
- Read the converted amount in every other weight unit.
- Copy the figure you want.
Frequently asked questions
What weight and mass units are included?
It converts between grams, kilograms, metric tonnes, ounces, pounds, and stones using exact conversion factors.
Is it using exact factors or approximations?
It uses exact factors, for example 1 pound equals 0.45359237 kilograms, so results are accurate to full precision.
Can I convert kilograms to pounds here?
Yes. Enter a value in kilograms and the pounds field updates instantly, along with grams, ounces, tonnes, and stones.
What is Weight / Mass Converter?
Convert weight and mass between the units you actually use every day: grams, kilograms, metric tonnes, ounces, pounds, and stones. Whether you are reading a recipe from another country, checking a parcel against a shipping limit, tracking body weight, or converting a lab figure, this tool gives an instant answer with exact definitions built in (one pound is exactly 0.
Is Weight / Mass Converter free to use?
Yes. Weight / Mass Converter is completely free, with no sign-up and no usage limits.
Does Weight / Mass Converter work in a web browser?
Yes. Weight / Mass Converter runs in any modern web browser. There is nothing to download or install.
Is my data private with Weight / Mass Converter?
Yes. Weight / Mass Converter runs entirely on your device in your browser, so nothing you enter is uploaded to a server.
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