⚖️ Weight converter
Convert between kilograms, pounds, ounces, grams, stone and tons. Enter a value and pick its unit to see it in every other unit.
Popular weight conversions
| Conversion | Rate |
|---|---|
| Pounds to kilograms | 1 lb = 0.45359237 kg |
| Kilograms to pounds | 1 kg = 2.2046226 lb |
| Grams to ounces | 1 g = 0.035273962 oz |
| Ounces to grams | 1 oz = 28.349523 g |
| Grams to pounds | 1 g = 0.0022046226 lb |
| Pounds to grams | 1 lb = 453.59237 g |
| Ounces to pounds | 1 oz = 0.0625 lb |
| Stone to pounds | 1 st = 14 lb |
| Stone to kilograms | 1 st = 6.3502932 kg |
| Kilograms to stone | 1 kg = 0.15747304 st |
| Milligrams to grams | 1 mg = 0.001 g |
| Tons (US) to pounds | 1 ton = 2,000 lb |
Quick answers
- 50 lbs to kg
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- 400 lbs to kg
- 500 lbs to kg
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- 200 kg to lbs
- 300 kg to lbs
- 400 kg to lbs
- 500 kg to lbs
- 100 grams to oz
- 200 grams to oz
- 300 grams to oz
- 400 grams to oz
- 500 grams to oz
- 600 grams to oz
- 10 oz to grams
- 20 oz to grams
- 30 oz to grams
- 40 oz to grams
- 50 oz to grams
- 100 oz to grams
- 5 stone to lbs
- 10 stone to lbs
- 15 stone to lbs
- 20 stone to lbs
- 25 stone to lbs
- 30 stone to lbs
- 5 stone to kg
- 10 stone to kg
- 15 stone to kg
- 20 stone to kg
- 25 stone to kg
- 30 stone to kg
- 40 kg to stone
- 50 kg to stone
- 60 kg to stone
- 70 kg to stone
- 100 kg to stone
- 150 kg to stone
About weight units
Strictly speaking these are units of mass. In everyday use "weight" means the same thing, and the conversions are identical.
The international pound is exactly 0.45359237 kg, so pound and kilogram conversions are exact. Troy ounces, used for precious metals, are a different unit from the ordinary ounce.
Weight units
| Unit | Symbol | In kilograms |
|---|---|---|
| Milligram | mg | 0.000001 kg |
| Gram | g | 0.001 kg |
| Kilogram | kg | 1 kg |
| Ounce | oz | 0.02834952313 kg |
| Pound | lb | 0.45359237 kg |
| Stone | st | 6.35029318 kg |
| Metric Ton | t | 1,000 kg |
| Ton (US) | ton | 907.18474 kg |
| Long Ton (UK) | LT | 1,016.046909 kg |
| Microgram | mcg | 1 × 10⁻⁹ kg |
| Troy Ounce | oz t | 0.0311034768 kg |
| Carat | ct | 0.0002 kg |
| Grain | gr | 0.00006479891 kg |
All weight conversions
From milligrams
From grams
From kilograms
From ounces
From pounds
From stone
From metric tons
From tons (US)
From long tons (UK)
From micrograms
From troy ounces
From carats
From grains
Weight unit definitions
- Milligram (mg)
- A milligram is one thousandth of a gram. Medicine doses and nutrition labels use milligrams.
- Gram (g)
- A gram is one thousandth of a kilogram. Food packaging and recipes outside the US weigh ingredients in grams.
- Kilogram (kg)
- The kilogram is the SI base unit of mass, defined since 2019 by a fixed value of the Planck constant.
- Ounce (oz)
- An avoirdupois ounce is one sixteenth of a pound, or 28.349523125 grams. Not to be confused with the fluid ounce, which measures volume.
- Pound (lb)
- The international avoirdupois pound is exactly 0.45359237 kilograms, defined in 1959. A pound is 16 ounces.
- Stone (st)
- A stone is 14 pounds, about 6.35 kilograms. People in the UK and Ireland still give their body weight in stone and pounds.
- Metric Ton (t)
- A metric ton (tonne) is 1,000 kilograms, a little more than 2,204 pounds.
- Ton (US) (ton)
- The US ton, or short ton, is 2,000 pounds, about 907 kilograms.
- Long Ton (UK) (LT)
- The long ton, or imperial ton, is 2,240 pounds, about 1,016 kilograms. It is still used for ship displacement.
- Microgram (mcg)
- A microgram (mcg or µg) is one millionth of a gram. Vitamin doses such as B12 and vitamin D are measured in micrograms.
- Troy Ounce (oz t)
- A troy ounce is 31.1034768 grams, about 10% heavier than an ordinary ounce. Gold, silver and platinum prices are quoted per troy ounce.
- Carat (ct)
- A metric carat is exactly 200 milligrams. It measures the weight of gemstones and pearls.
- Grain (gr)
- A grain is exactly 64.79891 milligrams. There are 7,000 grains in a pound; it is used for bullets, arrows and some medicines.