Skip to content

Weight converters

14 converters. Metric, US and UK weights, each with the formula and the math worked out with your numbers.

Body weight

Kitchen & everyday

Small amounts

Heavy loads

Weight units at a glance

Unit Symbol In kilograms Defined as
Milligram mg 0.000001 1/1,000 of a gram
Gram g 0.001 1/1,000 of a kilogram
Kilogram kg 1 SI base unit of mass
Ounce oz 0.02835 1/16 of a pound (avoirdupois)
Pound lb 0.453592 Exactly 0.45359237 kg (international pound, 1959)
Stone st 6.350293 14 pounds (UK body weight)
US ton ton 907.18474 2,000 pounds (short ton)