Convert pounds to kilograms in one step. Type a value, change the units if you need a different pair, and the answer updates as you type, with the reverse rate and a quick reference list.
Results are estimates for planning. Check the figures before you make a financial or health decision.
How to convert pounds to kilograms
Multiply the number of lb by 0.453592 to get kg:
kg = lb × 0.453592
To go the other way, divide by 0.453592 (or multiply by 2.204623). The converter stores each unit as a multiple of a base unit, so you can also pick any other pair of units from the same group.
Worked example
Using the default values in the converter above:
| Input | Value |
|---|---|
| Value | 150 |
| From | Pounds |
| To | Kilograms |
150 pounds equals 68.038855 kilograms
Pounds (Lbs) to KG reference table
| Pounds | Kilograms |
|---|---|
| 1 lb | 0.453592 kg |
| 2 lb | 0.907185 kg |
| 5 lb | 2.267962 kg |
| 10 lb | 4.535924 kg |
| 20 lb | 9.071847 kg |
| 50 lb | 22.679619 kg |
| 100 lb | 45.359237 kg |
| 200 lb | 90.718474 kg |
| 500 lb | 226.796185 kg |
Tips and common mistakes
The pound is defined as exactly 0.45359237 kg, and the avoirdupois ounce as one sixteenth of a pound (28.349523125 g). A stone is 14 pounds, which is 6.35029318 kg. These are the units used for body weight in the UK and for most food and shop weights.
Watch out for the troy ounce, used for gold and silver, which is about 31.1 g and is not the same as the everyday ounce. Also check whether a figure is in pounds or stones, because 11 st is 154 lb, not 11 lb.
For a rough mental conversion, a kilogram is about 2.2 lb, and 100 g is a little over 3.5 oz.
Frequently asked questions
How many kilograms are in 1 lb?
1 lb equals 0.453592 kilograms.
How do I convert lb to kg by hand?
Multiply the lb figure by 0.453592. For example, 150 lb × 0.453592 = 68.038855 kg.
How do I convert kg back to lb?
Divide the kg figure by 0.453592, or multiply it by 2.204623. For example, 68.038855 kg is 150 lb.
Is this conversion exact?
The pound and ounce are defined exactly in kilograms, so the factor is exact. Any difference comes only from rounding.