Simple Converter

Weight Converters

Convert between kilograms, pounds, ounces, grams, and stones with exact factors from the 1959 international pound definition.

Weight converter

1 kg = 2.20462 lb

All weight converters

KG to Pounds

1 kg = 2.20462 lb

Pounds to KG

1 lb = 0.453592 kg

Grams to Ounces

1 g = 0.035274 oz

Ounces to Grams

1 oz = 28.3495 g

About weight units

The metric side uses the kilogram — the SI base unit of mass — and the gram for smaller amounts. The imperial and US customary side uses the pound and ounce (16 ounces to the pound), plus the stone (14 pounds), which is still the everyday unit for body weight in the United Kingdom and Ireland.

The systems are tied together exactly: since 1959, one avoirdupois pound is defined as 0.45359237 kilograms. All the converters here derive from that exact definition, so a value converted to pounds and back to kilograms returns precisely where it started.