Mass & Weight Calculator
Convert between mass units and calculate weight on different planets.
Conversions
How It Works
Mass is constant throughout the universe, but weight depends on gravity. 1 kg = 2.20462 lb = 35.274 oz = 1000 g. Planetary weight uses surface gravity relative to Earth (1g). For example, Mars gravity is 0.38g, so you weigh 38% of your Earth weight.
About this Calculator
The Mass & Weight Calculator is a free, easy-to-use tool for kg, lb, convert. Simply enter your values and get instant, accurate results — no signup, no ads, no tracking. All calculations run locally in your browser, so your data stays completely private.
Privacy Note: All calculations are performed locally in your browser. No data is ever sent to a server or third party.