Measure Converter

Did You Know?

The kilogram was once defined by a physical platinum-iridium cylinder stored in France! Since 2019, it’s based on Planck’s constant, a fundamental physics value.

The pound (lb) comes from ancient Rome’s "libra pondo," meaning "a pound by weight."

A carat, used for gemstones, equals 200 milligrams—a standard set in 1907.

Quick Reference

• 1 kg = 1000 g
• 1 g = 1000 mg
• 1 mg = 1000 μg (micrograms)
• 1 t (metric tonne) = 1000 kg
• 1 lb (pound) = 16 oz
• 1 oz ≈ 28.35 g
• 1 lb ≈ 453.59 g
• 1 stone = 14 lb
• 1 cwt (hundredweight) = 100 lb (US)
• 1 ton (short ton) = 2000 lb (US)
• 1 ton-uk (long ton) = 2240 lb (UK)
• 1 ct (carat) = 0.2 g
• 1 gr (grain) ≈ 0.0648 g
• 1 dram ≈ 1.7718 g