Weight / Mass Converter

Convert the mass units used in daily life, shipping, cooking and science. The familiar word “weight” is used while the quantities listed are units of mass.

How weight / mass converter works

Values are normalized through kilograms. One international avoirdupois pound is exactly 0.45359237 kilograms.

Example formula: kilograms × 2.2046226218 = pounds

Accurate, private conversion

The conversion engine uses standardized constants and keeps calculation precision separate from display formatting. Your entered values stay in this browser and are not added to the URL or sent to the server.

Frequently asked questions

Are weight and mass the same?

Mass is the amount of matter; weight is the force gravity exerts on it. Everyday scales commonly label mass in kilograms or pounds.

Which ton does this converter use?

Metric tonne, US short ton and Imperial long ton are separate, clearly labeled units.