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Weight & Mass Converter — All Units with Formulas

Convert between 9 weight & mass units in one place — Kilogram, Gram, Milligram, Pound, Ounce, Stone and more. Results update as you type.

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All weight & mass units explained

UnitSymbolValue in KilogramDescription
Kilogramkg1 kgThe kilogram is the SI base unit of mass. Groceries, body weight and most goods in Bangladesh are measured in kilograms.
Gramg0.001 kgA gram is one thousandth of a kilogram, used for food packaging, spices, medicine and jewelry.
Milligrammg0.000001 kgA milligram is one thousandth of a gram, mostly used for medicine doses and nutrition labels.
Poundlb0.45359237 kgThe avoirdupois pound is exactly 0.45359237 kg. It is the common unit of body weight in the US and in gyms worldwide.
Ounceoz0.0283495231 kgAn ounce is 1/16 of a pound (about 28.35 g), used for food portions and postal weights in the US and UK.
Stonest6.35029318 kgA stone equals 14 pounds (about 6.35 kg) and is used for body weight in the UK and Ireland.
Metric Tont1,000 kgA metric ton (tonne) equals 1,000 kilograms, used for cargo, rice production and industrial goods.
Maund (Mon)mon37.3242 kgThe maund (mon) is a traditional South Asian unit. One standard mon equals 40 seer, or about 37.3242 kg, and is still used for rice, paddy and jute in Bangladesh.
Seerseer0.933104 kgA seer is a traditional unit equal to 1/40 maund (about 0.933 kg), used in local markets in Bangladesh and India.

Popular weight & mass conversions

Each conversion below has its own page with a formula, worked example and table.

When do you need a weight & mass converter?

Weight & mass conversions are used for cooking, shipping parcels, body weight, groceries, gym training and trade. Different countries and industries use different units, so a reliable converter prevents costly mistakes.

Frequently asked questions

Which weight & mass units are supported?

Kilogram (kg), Gram (g), Milligram (mg), Pound (lb), Ounce (oz), Stone (st), Metric Ton (t), Maund (Mon) (mon), Seer (seer).

Is the converter free?

Yes, completely free with no limits, and it works offline once loaded.

How accurate are the results?

Conversions use exact standard factors with full double-precision arithmetic.