Convert between 12 units of weight and mass — metric, imperial, and more. Results update as soon as you click Convert.
| Unit | Equivalent |
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Weight conversion is the process of expressing a measurement of mass or weight in a different unit. The two most widely used systems are the metric system (kilograms, grams) and the imperial/US customary system (pounds, ounces). Whether you're cooking a recipe, tracking your fitness, shipping a package, or doing scientific work, being able to convert between weight units quickly is an essential everyday skill.
The metric system uses kilograms (kg) as its base unit of mass. It follows powers of 10 — 1 kilogram = 1,000 grams = 1,000,000 milligrams — making conversions within the system easy. The imperial system uses pounds (lbs) and ounces (oz), where 1 pound = 16 ounces. The US also uses tons (short tons = 2,000 lbs), while the UK uses long tons (2,240 lbs).
| From | To | Value |
|---|---|---|
| 1 Kilogram | Pounds | 2.20462 lb |
| 1 Kilogram | Ounces | 35.274 oz |
| 1 Pound | Kilograms | 0.453592 kg |
| 1 Pound | Grams | 453.592 g |
| 1 Ounce | Grams | 28.3495 g |
| 1 Stone | Kilograms | 6.35029 kg |
| 1 Stone | Pounds | 14 lb (exact) |
| 1 Metric Ton | Kilograms | 1,000 kg |
| 1 US Ton | Kilograms | 907.185 kg |
| 1 Troy Ounce | Grams | 31.1035 g |
1 kilogram = 2.20462 pounds. Conversely, 1 pound = 0.453592 kilograms. This is one of the most common everyday conversions — useful for fitness, food labels, and travel.
1 pound = 453.592 grams. So if a recipe calls for 1 lb of flour and you have a scale in grams, you'd use 453.6 grams.
1 stone = 14 pounds = 6.35029 kilograms. Stone is a unit of weight used mainly in the United Kingdom and Ireland, most commonly for measuring body weight. A person weighing 11 stone is 154 lbs or about 69.9 kg.
A metric ton (tonne) = 1,000 kg = 2,204.6 lbs. A US ton (short ton) = 2,000 lbs = 907.2 kg. An imperial ton (long ton) = 2,240 lbs = 1,016 kg. The metric ton is used internationally, while short tons are common in the US and long tons in the UK.
A troy ounce = 31.1035 grams, which is heavier than a regular (avoirdupois) ounce of 28.3495 grams. Troy ounces are used to measure precious metals like gold, silver, and platinum. When you see gold priced per ounce, that's always in troy ounces.
1 carat = 0.2 grams = 200 milligrams. Carats are used to measure the weight of gemstones like diamonds. Note that carat for gemstones is different from karat, which measures gold purity.
1 pound = 16 ounces (avoirdupois). This is the standard in the US and UK for everyday weight measurements like food and body weight.