Pounds to Kilograms
A pound is exactly 0.45359237 kilograms, the everyday unit for body weight and groceries in the US. The kilogram is the SI base unit of mass, defined today by the fixed value of the Planck constant. 1 lb equals ≈0.453592 kg, so converting between them is a matter of multiplying by that fixed factor — type any value into the converter below and both sides update instantly as you type.
Both units belong to mass, measured here against mass's base unit (kg) — every other mass unit on this site converts through that same reference point, which is why the table below can also be read as a quick cross-check against nearby values.
Formula
kg = lb × ≈0.453592
lb = kg × ≈2.20462
Worked example: 5 lb × ≈0.453592 = ≈2.26796 kg.
Conversion table
| Pound (lb) | Kilogram (kg) |
|---|---|
| 1 lb | ≈0.453592 kg |
| 2 lb | ≈0.907185 kg |
| 3 lb | ≈1.36078 kg |
| 5 lb | ≈2.26796 kg |
| 10 lb | ≈4.53592 kg |
| 20 lb | ≈9.07185 kg |
| 25 lb | ≈11.3398 kg |
| 50 lb | ≈22.6796 kg |
| 100 lb | ≈45.3592 kg |
| 250 lb | ≈113.398 kg |
| 500 lb | ≈226.796 kg |
| 1,000 lb | ≈453.592 kg |
Frequently asked
- How many Kilograms in a pound?
- 1 lb equals ≈0.453592 kg.
- How do I convert Pounds to Kilograms?
- Multiply the value in lb by ≈0.453592 to get kg. The converter above does this instantly as you type.
- Is the conversion exact?
- Yes — Pound and Kilogram are both defined by a fixed conversion factor to mass's base unit (kg), so the result shown is exact to the precision displayed, not an approximation.