Pound to Kilogram Converter
One Pound equals 0.45359237 Kilogram (1 lb = 0.45359237 kg). Multiply a Pound value by 0.45359237 to get the equivalent in Kilogram. Use the calculator above for instant results, or follow the formula, worked examples, and reference table below.
Formula
kg = lb × 0.45359237
Multiply the Pound value by 0.45359237 to get the equivalent value in Kilogram.
Example Conversions
1 Pound (lb)
0.45359237 Kilogram (kg)
5 Pound (lb)
2.26796185 Kilogram (kg)
10 Pound (lb)
4.5359237 Kilogram (kg)
25 Pound (lb)
11.33980925 Kilogram (kg)
100 Pound (lb)
45.359237 Kilogram (kg)
Conversion Table
| Pound (lb) | Kilogram (kg) |
|---|---|
| 0.1 | 0.045359237 |
| 0.5 | 0.226796185 |
| 1 | 0.45359237 |
| 2 | 0.90718474 |
| 5 | 2.26796185 |
| 10 | 4.5359237 |
| 25 | 11.33980925 |
| 50 | 22.6796185 |
| 100 | 45.359237 |
| 250 | 113.3980925 |
| 500 | 226.796185 |
| 1000 | 453.59237 |
How to Convert Manually
Use these steps to convert Pound values to Kilogram without the calculator.
- Write down the value in Pound (lb) that you want to convert.
- Multiply that value by 0.45359237.
- For example, 10 Pound × 0.45359237 = 4.5359237 Kilogram.
- Label the result as Kilogram (kg).
Relative Size Comparison
This chart shows the visual difference in size between exactly one Pound and one Kilogram.
About Pound and Kilogram
The pound (avoirdupois) is defined as exactly 0.45359237 kilograms under the 1959 international agreement. Body weight, groceries, and shipping in the US run on pounds. The kilogram is the SI base unit of mass, defined since 2019 by fixing the Planck constant rather than by the old platinum-iridium prototype. It is the reference for every other mass unit on this site. One Pound equals 0.45359237 Kilogram (1 lb = 0.45359237 kg). Pound to Kilogram conversion comes up most often in body weight in the US and in US grocery and butcher pricing, typically when figures need restating for body weight outside the US.
Precision and Rounding: Metric-imperial mass factors are exact (1 lb = 0.45359237 kg by the 1959 agreement), so precision is purely a display choice. One decimal place is enough for body weight and cooking; nutrition labeling, pharmacy, and lab work need the full factor before rounding.
Conversion factors per NIST Special Publication 811 and the BIPM SI Brochure (9th edition) (reference).
Worked Example
15 Pound equals 6.80388555 Kilogram.
15 lb × 0.45359237 = 6.80388555 kg
FAQ
How do I convert Pound to Kilogram?
Multiply the Pound value by 0.45359237 to get the equivalent value in Kilogram.
What is the formula for Pound to Kilogram?
The formula is kg = lb × 0.45359237.
How many Kilogram are in 1 Pound?
1 Pound equals 0.45359237 Kilogram.
Can I convert Kilogram back to Pound?
Yes. 1 Kilogram equals 2.204622622 Pound, and the related converter can reverse the calculation.
What are common names for Pound and Kilogram?
Pound is shown as lb and may also be searched as pounds, lbs. Kilogram is shown as kg and may also be searched as kilograms, kilo, kilos.
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