How to use the weight converter
- Type a value in either box. Decimals with a comma or a point both work.
- Choose the units on each side, or press the arrows to swap them.
- The table below shows the value in every unit at once. Click a row to convert to that unit.
About weight units
Strictly, kilograms and pounds measure mass, the amount of matter in something, while weight is the force of gravity on it. In everyday use the words mean the same thing, and every unit here is a unit of mass, so 1 kg is 2.20462 lb on Earth or anywhere else. Force units such as the newton have their own converter.
The pound has been exactly 0.45359237 kg since 1959, and the rest of the US and imperial system follows from it: 16 ounces to the pound, 14 pounds to the stone, 2,000 pounds to the US (short) ton and 2,240 pounds to the UK (long) ton.
Watch for units that share a name. A metric ton (tonne) is 1,000 kg, a US ton is 907.18 kg and a UK ton is 1,016.05 kg. A troy ounce, used for gold and silver, is 31.1035 g, heavier than the 28.3495 g ounce used for food.
Popular weight conversions
- Kilograms to pounds
- Pounds to kilograms
- Grams to ounces
- Ounces to grams
- Stone to kilograms
- Kilograms to stone
- Ounces to pounds
- Pounds to ounces
- US tons to kilograms
- Grams to pounds
- Pounds to grams
- Kilograms to ounces
- Stone to pounds
- Pounds to stone
- Grams to kilograms
- Kilograms to grams
- Milligrams to grams
- Grams to milligrams
- Micrograms to milligrams
- Milligrams to micrograms
- US tons to pounds
- Pounds to US tons
- Carats to grams
- Grams to carats
- Troy ounces to grams
- Grams to troy ounces
Weight units
| Unit | Symbol | Definition |
|---|---|---|
| Micrograms | µg | 1 µg = 1 × 10⁻⁹ kg |
| Milligrams | mg | 1 mg = 0.000001 kg |
| Grams | g | 1 g = 0.001 kg |
| Kilograms | kg | The base unit |
| Metric tons | t | 1 t = 1,000 kg |
| Ounces | oz | 1 oz = 0.02834952313 kg |
| Pounds | lb | 1 lb = 0.45359237 kg |
| Stone | st | 1 st = 6.35029318 kg |
| US tons | ton | 1 ton = 907.18474 kg |
| UK tons | long ton | 1 long ton = 1,016.046909 kg |
| Carats | ct | 1 ct = 0.0002 kg |
| Grains | gr | 1 gr = 0.00006479891 kg |
| Troy ounces | oz t | 1 oz t = 0.0311034768 kg |
Converting something else? The unit converter covers every kind of unit in one place.