Weight & Mass Converter

Convert between different units of weight and mass including kilograms, pounds, ounces, grams, stones, and more.

Weight & Mass Conversion Calculator

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Common Weight Conversions

Weight & Mass Units Reference

Metric System

1 t = 1,000 kg
1 kg = 1,000 g
1 g = 1,000 mg
1 ct = 200 mg

Imperial System

1 ton (US) = 2,000 lb
1 ton (UK) = 2,240 lb
1 st = 14 lb
1 lb = 16 oz

Key Conversions

1 kg = 2.205 lb
1 oz = 28.35 g
1 st = 6.35 kg
1 gr = 64.8 mg