Calculate weight from mass and gravity. Supports multiple units, planets, and instant conversion.
Weight = mass × gravity. Common units: Newton (N), pound-force (lbf), kilogram-force (kgf).
Earth: 9.81 m/s², Moon: 1.62 m/s², Mars: 3.71 m/s², Jupiter: 24.79 m/s².
A 1 kg mass weighs 9.81 N on Earth, 1.62 N on the Moon, 2.2 lbf on Earth.