Convert Pounds to Kilograms – Weight Converter
Use this converter to move seamlessly between pound and kilogram with instant precision.
Interactive Converter
Convert between pound and kilogram with precision rounding.
Quick reference table
| Pound | Kilogram |
|---|---|
| 1 lb | 0.4536 kg |
| 5 lb | 2.268 kg |
| 10 lb | 4.5359 kg |
| 25 lb | 11.3398 kg |
| 50 lb | 22.6796 kg |
| 100 lb | 45.3592 kg |
How to use this Pound converter
- 1. Enter the value you want to convert in the first input field. You can type decimals or whole numbers.
- 2. The result updates instantly with our high-precision formulas, rounding to sensible decimal places for practical use.
- 3. Use the swap button to reverse the calculation and move from kilogram back to pound.
Conversion formula explained
To convert pound to kilogram, multiply the input value by the precise conversion factor derived from international measurement standards. The formula looks like this:
kg = (lb × 0.45359237)
We compute the factor using the SI base unit as the truth source to guarantee accuracy even across chained conversions (e.g., meters → feet → inches).
Expert Q&A
What is the exact formula for pound to kilogram?
Multiply your value in pound by 0.45359237 to obtain the equivalent in kilogram.
Can I convert kilogram back to pound?
Yes. Hit the swap button in the converter to reverse the calculation or multiply your kilogram value by 2.20462262 to switch back.
How accurate is this converter?
We anchor every conversion to internationally recognized base units. The calculator rounds to sensible decimals for readability, but core math runs at double precision.