Mass Converter

Grams, pounds, ounces, tonnes.

мг
Milligram
г
Gram
кг
Kilogram
т
Tonne
oz
Ounce
lb
Pound

The mass converter translates weight between metric and imperial units: milligram, gram, kilogram, tonne, ounce (oz), and pound (lb). Type a value into any field and the other units update instantly.

Converting mass comes up when following foreign recipes measured in ounces and pounds, ordering goods from the US or Europe, calculating parcel or luggage weight, and in sports and medicine. Handy reference points: 1 ounce ≈ 28.35 g, 1 pound ≈ 453.6 g (about 0.45 kg), 1 tonne = 1000 kg. Note that this tool covers mass — the weight of food or parcels — not volume; for liquids and bulk ingredients in recipes, use the volume converter instead.

Calculations go through the kilogram as a base unit, so any pair of units converts precisely. Everything is calculated right in your browser, with no data sent anywhere.

Frequently asked questions

1 pound = 0.453592 kg (the international avoirdupois pound). 1 kg ≈ 2.2046 pounds.
1 ounce (avoirdupois) ≈ 28.3495 g. There are 16 ounces in a pound.
Metric (1000 kg). The US short ton (907.18 kg) and the UK long ton (1016 kg) are not used here.

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