Convert weight, instantly.
Kilograms, grams, pounds, ounces, stone and metric tons — type a value and the result updates as you go.
Weight Converter
Weight conversion benchmarks
⚖️ Weight
| 1 pound | 0.453592 kg |
| 1 ounce | 28.3495 g |
| 1 stone | 6.35029 kg |
| 1 kilogram | 2.20462 lb |
How this conversion works
Every weight unit here converts through kilograms as the base unit, using the internationally defined pound (exactly 0.45359237 kg). That's why converting, say, stone to grams gives a precise result rather than a rounded approximation.
Stone is mostly used for body weight in the UK and Ireland; if a result looks unfamiliar, it's worth double-checking which unit your source actually meant — 'ton' alone is ambiguous between metric tons (1,000 kg) and the US short ton (907.185 kg), so this converter is explicit about using the metric ton.
Frequently asked questions
Is a US ton the same as a metric ton?
No. A US short ton is 907.185 kg, while the metric ton (tonne) used in this converter is exactly 1,000 kg. The UK long ton is different again, at 1,016.05 kg.
Why does my scale show a different number than this converter?
Bathroom and kitchen scales round for display and can drift out of calibration over time. This converter applies the exact mathematical factor, so small discrepancies against a physical scale are usually the scale, not the math.