ToolPikaHow it works
Every unit is defined by its mass in kilograms, and the converter multiplies by the ratio between the two units you choose. The line under the result shows that ratio, so you can reuse it by hand.
Imperial units all derive from the pound, fixed in 1959 at exactly 0.45359237 kg:
| Unit | Definition | In metric |
|---|---|---|
| Ounce (oz) | 1/16 lb | 28.349523125 g |
| Pound (lb) | Base imperial unit | 453.59237 g |
| Stone (st) | 14 lb | 6.35029318 kg |
| US ton | 2,000 lb | 907.18474 kg |
| UK ton | 2,240 lb | 1,016.0469088 kg |
| Carat (ct) | Used for gemstones | 200 mg |
Strictly speaking, kilograms and pounds measure mass, while weight is a force. In everyday use the two are treated as the same thing, and this converter follows that convention.
Examples
- Body weight. 70 kg is 154.32 lb; 150 lb is 68.04 kg; 11 stone is 69.85 kg.
- Luggage. A 23 kg airline allowance is 50.7 lb, which is why US airlines quote 50 lb.
- Cooking. 500 g of flour is 17.64 oz, a little over a pound.
- Jewellery. A 1-carat diamond weighs 0.2 g.
Quick reference
| From | To | Multiply by |
|---|---|---|
| Kilograms | Pounds | 2.20462 |
| Pounds | Kilograms | 0.453592 |
| Grams | Ounces | 0.035274 |
| Ounces | Grams | 28.3495 |
| Stones | Kilograms | 6.35029 |