ManyConvert lbs to kg
1 pound = 0.4535924 kilograms. Type a value below for an instant lbs to kg conversion, or use the table for common values.
| Pounds | Kilograms |
|---|---|
| 1 lb | 0.4535924 kg |
| 2 lb | 0.9071847 kg |
| 3 lb | 1.360777 kg |
| 4 lb | 1.814369 kg |
| 5 lb | 2.267962 kg |
| 10 lb | 4.535924 kg |
| 15 lb | 6.803886 kg |
| 20 lb | 9.071847 kg |
| 25 lb | 11.33981 kg |
| 30 lb | 13.60777 kg |
| 40 lb | 18.14369 kg |
| 50 lb | 22.67962 kg |
| 75 lb | 34.01943 kg |
| 100 lb | 45.35924 kg |
How pounds convert to kilograms
One pound is exactly 0.45359237 kg — a definition agreed internationally in 1959 — so kg = pounds × 0.45359237.
In your head: halve it and take off a tenth. For 150 lb, half is 75, less 7.5 is 67.5 kg. The exact figure is 68.04.
Pounds and ounces
There are 16 ounces in a pound. For a weight such as 7 lb 8 oz, turn the ounces into a decimal by dividing by 16 — 7.5 lb — and then convert: 7.5 × 0.4536 = 3.40 kg.
Gym weights
Plates and dumbbells are a common source of confusion because pound and kilogram sets look alike but are not the same weight.
| Pounds | Kilograms | Nearest kg plate |
|---|---|---|
| 2.5 | 1.13 | 1.25 |
| 5 | 2.27 | 2.5 |
| 10 | 4.54 | 5 |
| 25 | 11.34 | 10 |
| 45 | 20.41 | 20 |
A 45 lb bar and a 20 kg bar are within half a kilogram of each other, but a programme written in pounds drifts when followed with kilogram plates: “225 lb” is 102 kg, not the 100 kg that two 20 kg plates a side and a 20 kg bar add up to.
Body weight
Medicine doses, BMI and most health guidance are worked out in kilograms. Converting 180 lb gives 81.6 kg. If a scale shows stones and pounds, as many British scales do, multiply the stones by 14, add the pounds, and convert the total.
Why “lb”?
The abbreviation comes from libra, the Roman unit of weight, which is also why the pound sterling sign is a stylised L. The pound used for goods is the avoirdupois pound; precious metals use the troy system, in which an ounce is heavier and there are only twelve of them to the pound.
Convert lbs to kg quickly and accurately with this free tool. 1 pound = 0.4535924 kilograms. Need the other direction? Kilograms to Pounds. For every other unit, use the full ManyHand Unit Converter.
How do I convert lbs to kg?
Multiply the number of pounds by 0.4535924. For example, 10 lb = 4.535924 kg. You can also type any value in the converter above.
What is 1 pound in kilograms?
1 pound equals 0.4535924 kilograms. Conversely, 1 kilogram equals 2.204623 pounds.
Is this lbs to kg converter free?
Yes. It's free with no sign-up, works on phone and desktop, and runs entirely in your browser.