Weight & Mass Converter (mg, g, kg, lb, oz, stone, ...)
Convert a weight or mass between metric units (milligrams through metric tons) and imperial/US units (ounces, pounds, stone, tons). Runs entirely in your browser.
How it works
Every unit is converted through a common base unit — the gram. Note that a US ton (short ton, 907.18 kg) and a UK ton (long ton, 1016.05 kg) are different from each other and from the metric ton (1000 kg) — check which one applies before comparing figures across sources.
Common conversions
| From | To | Result |
|---|---|---|
| 1 kg | lb | 2.20462 lb |
| 1 lb | kg | 0.45359 kg |
| 1 stone | kg | 6.35029 kg |
| 1 oz | g | 28.3495 g |
FAQ
How many pounds is a stone?
1 stone = 14 lb — the stone is still commonly used for body weight in the UK and Ireland.
Is a US ton the same as a metric ton?
No. 1 US (short) ton = 907.18 kg, 1 metric ton = 1000 kg, and 1 UK (long) ton = 1016.05 kg.