Weight and Mass Converter
Convert grams, kilograms, ounces, pounds, tonnes and stone. One pound is exactly 0.45359237 kg by definition.
Common weight conversions
| Conversion | Result |
|---|---|
| 1 ounce | 28.3495 g |
| 1 pound | 0.4536 kg |
| 1 pound | 16 oz |
| 1 kilogram | 2.2046 lb |
| 1 stone | 6.3503 kg (14 lb) |
| 1 tonne | 1,000 kg |
Worked example
A person weighing 150 lb: 150 x 0.45359237 kg = 68.04 kg. In stone, 150 divided by 14 = 10.71 stone. Enter 150, choose Pounds, then choose Kilograms to see 68.04 kg.
Frequently asked questions
Is a Canadian tonne the same as a US ton?
No. A tonne (metric ton) is exactly 1,000 kg. A US short ton is 2,000 lb, which is 907.18 kg. Gravel and soil suppliers in Canada usually quote tonnes, so check which unit a quote uses before comparing prices.
How many grams are in an ounce?
Exactly 28.349523125 g, because the pound is defined as exactly 0.45359237 kg and there are 16 ounces in a pound. This converter shows 28.3495 g.
Results are provided for general reference. Do not use for medical dosing or commercial settlement weights.