Weight Converter

• Kilograms to Pounds1 kg = 2.20462 lb
• Pounds to Kilograms1 lb = 0.453592 kg
• Kilograms to Grams1 kg = 1,000 g
• Kilograms to Milligrams1 kg = 1e+6 mg
• Kilograms to Micrograms1 kg = 1e+9 µg
• Kilograms to Metric Tons1 kg = 0.001 t
• Kilograms to Ounces1 kg = 35.274 oz
• Kilograms to Stones1 kg = 0.157473 st
• Kilograms to Tons US1 kg = 0.00110231 ton (US)
• Kilograms to Tons UK1 kg = 0.000984207 ton (UK)
• Kilograms to Carats1 kg = 5,000 ct
• Kilograms to Grains1 kg = 15,432.4 gr

All 50 weight units are converted through a single base unit, so any unit can be converted to any other. Enter a value, choose the units and press Convert, or open a conversion page for the exact factor and a reference table.

For example, 1 kilograms (kg) = 2.20462 pounds (lb).

Kilograms (kg)

The kilogram is the SI base unit of mass, defined since 2019 by fixing the value of the Planck constant. One kilogram is about 2.205 pounds.

Grams (g)

A gram is one thousandth of a kilogram, roughly the mass of a paperclip. Recipes, nutrition labels and postage are commonly measured in grams.

Milligrams (mg)

A milligram is one thousandth of a gram. Medication doses and vitamin contents are usually stated in milligrams.

Micrograms (µg)

A microgram (µg) is one millionth of a gram. It is used for trace nutrients, hormones and very small drug doses.

Metric Tons (t)

A metric ton, or tonne, is exactly 1,000 kilograms (about 2,204.6 pounds). It is the standard unit for freight, vehicles and bulk materials outside the United States.

Pounds (lb)

The avoirdupois pound is defined as exactly 0.45359237 kilograms and is divided into 16 ounces. It is the everyday weight unit in the United States.

Ounces (oz)

An avoirdupois ounce is one sixteenth of a pound, about 28.35 grams. It is used for food portions and postal weights, and is not the same as a fluid ounce, which measures volume.

Stones (st)

A stone is 14 pounds (about 6.35 kilograms). Body weight in the United Kingdom and Ireland is traditionally given in stones and pounds.

Tons US (ton (US))

A US ton, or short ton, is 2,000 pounds (about 907.2 kilograms). It is the ton normally meant in the United States.

Tons UK (ton (UK))

A UK ton, or long ton, is 2,240 pounds (about 1,016 kilograms). It was the standard ton of the British imperial system and is still used for ship displacement.

Grains (gr)

A grain is 1/7,000 of a pound, exactly 64.79891 milligrams. It is still used for bullet and arrow weights and some pharmaceutical measures.

Atomic Mass Units (u)

An atomic mass unit is one twelfth of the mass of a carbon-12 atom, about 1.6605 × 10⁻²⁷ kilograms. Atomic and molecular masses are expressed in this unit.

Carats (ct)

A carat is exactly 0.2 grams and is the unit for gemstone weights. It should not be confused with karat, which measures gold purity.

Daltons (Da)

The dalton is another name for the atomic mass unit, used mainly in biochemistry for the masses of proteins and other large molecules.

Troy Ounces (oz t)

A troy ounce is about 31.103 grams, roughly 10% heavier than the avoirdupois ounce. Gold, silver and other precious metals are priced per troy ounce.

Earth Mass (M⊕)

An Earth mass is the mass of the Earth, about 5.972 × 10²⁴ kilograms. It is used to express the masses of rocky planets and exoplanets.

Sun Mass (M☉)

A solar mass is the mass of the Sun, about 1.989 × 10³⁰ kilograms, the standard unit for the masses of stars, galaxies and black holes.

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