Weight & Mass Converter

Convert weight and mass: grams, kilograms, tonnes, ounces, pounds, stones, carats and tolas.

kg = g × 0.001

Weight & Mass units and how they relate

The avoirdupois pound is defined as exactly 0.45359237 kg and the ounce as 1/16 of a pound. The metric carat is exactly 200 mg. The tola used across South Asia is 180 grains, which is 11.6638038 g.

UnitSymbolEquals in grams
1 milligrammg0.001 g
1 gramg1 g
1 kilogramkg1,000 g
1 tonnet1,000,000 g
1 ounceoz28.34952313 g
1 poundlb453.59237 g
1 stonest6,350.29318 g
1 US tonton907,184.74 g
1 imperial tonlong ton1,016,046.909 g
1 caratct0.2 g
1 tolatola11.6638038 g
1 troy ounceoz t31.1034768 g

Popular weight & mass conversions

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Frequently asked questions

How accurate is this weight & mass converter?

It uses the exact defined conversion factors for each unit and shows results to 10 significant digits. The avoirdupois pound is defined as exactly 0.45359237 kg and the ounce as 1/16 of a pound. The metric carat is exactly 200 mg. The tola used across South Asia is 180 grains, which is 11.6638038 g.

How do I convert grams to kilograms?

Enter the value, choose grams in the "From" list and kilograms in the "To" list. For example, 1 gram equals 0.001 kg.

Is the converter free?

Yes. It is free, needs no sign-up and runs entirely in your browser, so it also works offline once the page has loaded.

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