Convert Pound to Kilogram.
Input the value of pounds below to convert instantly to kilograms with standard conversions, definitions, and equations.
About converting pounds to kilograms
Pounds to kilograms is the reverse conversion travelers and patients reach for whenever an imperial weight has to fit a metric chart, dosage, or shipping label.
Because one pound is exactly 0.45359237 kg, converting pounds to kilograms means multiplying by roughly 0.4536. A 150 lb person is 68.0 kg, a 50 lb bag is 22.7 kg, and a 10 lb dumbbell is 4.54 kg.
Medicine relies heavily on this conversion: drug doses are frequently calculated per kilogram of body weight, so a weight recorded in pounds must be converted before a dose is set. That is one reason the pound-to-kilogram factor is worth knowing precisely rather than approximately.
- Quick estimate: halve the pounds, then subtract about 10% (150 ÷ 2 = 75, −7 ≈ 68).
- Keep more decimals for medical or scientific use; round only the final answer.
How to Convert Pounds to Kilograms
To convert pound to kilogram, we use the official conversion formulas. Below is the mathematical formula, plain-English explanation, and a worked example.
Pound (lb)
Standard imperial and US unit of mass equal to exactly 453.59237 grams.
Kilogram (kg)
The base SI unit of mass, standard worldwide for daily weight measurements.
Pound to Kilogram Conversion Table
| Pound (lb) | Kilogram (kg) |
|---|---|
| 1 lb | 0.45359 kg |
| 2 lb | 0.90718 kg |
| 3 lb | 1.36078 kg |
| 5 lb | 2.26796 kg |
| 10 lb | 4.53592 kg |
| 15 lb | 6.80389 kg |
| 20 lb | 9.07185 kg |
| 25 lb | 11.33981 kg |
| 50 lb | 22.67962 kg |
| 100 lb | 45.35924 kg |
| 250 lb | 113.39809 kg |
| 500 lb | 226.79619 kg |
| 1000 lb | 453.59237 kg |
Kilogram to Pound Conversion Table
| Kilogram (kg) | Pound (lb) |
|---|---|
| 1 kg | 2.20462 lb |
| 2 kg | 4.40925 lb |
| 3 kg | 6.61387 lb |
| 5 kg | 11.02311 lb |
| 10 kg | 22.04623 lb |
| 15 kg | 33.06934 lb |
| 20 kg | 44.09245 lb |
| 25 kg | 55.11557 lb |
| 50 kg | 110.23113 lb |
| 100 kg | 220.46226 lb |
| 250 kg | 551.15566 lb |
| 500 kg | 1102.31131 lb |
| 1000 kg | 2204.62262 lb |