Pounds to Kilograms Converter
lb → kg · ⚖️ Weight & Mass
1 Pounds = 0.45359237 Kilograms
How to convert Pounds to Kilograms
To convert Pounds to Kilograms, multiply the value in Pounds by 0.45359237. For example, 5 lb = 2.2679619 kg.
The Pounds-to-Kilograms conversion comes up often in everyday and professional contexts alike. With 1 lb equal to 0.45359237 kg, you can use the tool above for any value, or scan the table below for the most common Pounds amounts and their Kilograms equivalents.
Weight and mass conversions matter for cooking, shipping, fitness, science, and international trade. Although 'weight' and 'mass' are technically different concepts in physics, in everyday use the terms are interchangeable and the conversions are identical.
Understanding Pounds and Kilograms
The kilogram is the SI base unit of mass and the reference point for the entire metric system. Pounds and ounces dominate in the United States, while stones remain common for body weight in the UK and Ireland. Metric tons (1,000 kg) and US tons (2,000 lb) appear in freight, agriculture, and industry — and because they differ by about 10%, confusing them is a frequent and costly mistake.
How accurate is this conversion?
The pound is defined as exactly 0.45359237 kilograms, a definition adopted internationally in 1959. This means kilogram-to-pound conversions are exact, not approximate, so you can rely on the figures in the table below for any purpose, from postage to laboratory work.
All conversion factors on ClearUnits are based on internationally recognised standards (the International System of Units, SI, and official definitions). Factors are reviewed for accuracy and the calculator uses full-precision values, rounding only the displayed result.
Quick reference: common Pounds to Kilograms values
The most frequently searched conversions are 1 Pounds = 0.45359237 Kilograms, 5 Pounds = 2.2679619 Kilograms, 10 Pounds = 4.5359237 Kilograms, and 100 Pounds = 45.359237 Kilograms. The full table further down covers every common value, and the calculator handles any number you need in between.
Pro tip: For shipping and postage, always check whether a quoted weight is in metric or US tons — the difference of roughly 93 kilograms per ton can change shipping classes and costs significantly.
Pounds to Kilograms — Conversion Table
| Pounds (lb) | Kilograms (kg) |
|---|---|
| 0.1 lb | 0.045359237 kg |
| 0.25 lb | 0.11339809 kg |
| 0.5 lb | 0.22679619 kg |
| 1 lb | 0.45359237 kg |
| 2 lb | 0.90718474 kg |
| 5 lb | 2.2679619 kg |
| 10 lb | 4.5359237 kg |
| 25 lb | 11.339809 kg |
| 50 lb | 22.679619 kg |
| 100 lb | 45.359237 kg |
| 250 lb | 113.39809 kg |
| 500 lb | 226.79619 kg |
| 1000 lb | 453.59237 kg |