Weight (technically mass) conversion trips people up whenever a recipe, shipping label, or fitness app uses a different unit system than the one you're used to. This converter handles six common weight units using grams as the internal reference point.
Conversion factors used
| Unit | Grams equivalent |
|---|---|
| 1 milligram (mg) | 0.001 g |
| 1 kilogram (kg) | 1,000 g |
| 1 ounce (oz) | 28.3495 g |
| 1 pound (lb) | 453.592 g |
| 1 stone (st) | 6,350.29 g |
Worked examples
| From | To | Result |
|---|---|---|
| 1 kg | pounds | 2.20 lb |
| 16 oz | grams | 453.6 g |
| 10 st | kg | 63.5 kg |
Common mistakes
- Confusing weight with mass. In everyday use these terms are used interchangeably, though technically weight is a force and mass is the underlying quantity — this distinction rarely matters for practical conversions on Earth.
- Mixing up stone and pounds. One stone equals 14 pounds, a unit mainly used in the UK and Ireland for body weight.
References
- National Institute of Standards and Technology (NIST) — official unit definitions
Frequently asked questions
How many pounds are in a kilogram?
One kilogram equals approximately 2.20462 pounds.
How many pounds are in a stone?
One stone equals exactly 14 pounds, a unit commonly used in the UK and Ireland.
How do I convert ounces to grams?
Multiply the number of ounces by approximately 28.3495 to get grams.