How do you convert lbs to kg?
Multiply the pounds by 0.45359237. For a fast estimate, halve the pounds and take away a tenth of that half: 200 lb → 100 − 10 = 90 kg, close to the exact 90.72 kg.
- 1 lb
- 0.45359237 kg
- 10 lb
- 4.5359237 kg
- 100 lb
- 45.359237 kg
Lbs to kg table
| Pounds (lb) | Kilograms (kg) |
|---|---|
| 1 | 0.4535924 |
| 2 | 0.9071847 |
| 3 | 1.360777 |
| 4 | 1.814369 |
| 5 | 2.267962 |
| 6 | 2.721554 |
| 7 | 3.175147 |
| 8 | 3.628739 |
| 9 | 4.082331 |
| 10 | 4.535924 |
| Pounds (lb) | Kilograms (kg) |
|---|---|
| 12 | 5.443108 |
| 15 | 6.803886 |
| 20 | 9.071847 |
| 25 | 11.33981 |
| 30 | 13.60777 |
| 40 | 18.14369 |
| 50 | 22.67962 |
| 60 | 27.21554 |
| 75 | 34.01943 |
| 100 | 45.35924 |
Pounds in medicine, fitness and travel
Doctors and pharmacists in many countries work in kilograms even where patients know their weight in pounds, because drug doses are often set per kilogram of body weight. A child of 44 lb weighs about 20 kg, and a dose of 10 mg per kilogram comes to about 200 mg. In that setting, round the kilograms only after the dose is worked out.
Workout plans written in pounds can be followed with kilogram plates by converting the target load and picking the nearest plate combination. 135 lb is 61.2 kg, so a 20 kg bar with 20 kg on each side gets you to 60 kg, just under the plan.
How exact the factor is
The value 0.45359237 is not a measurement but a definition, agreed in 1959 and used by every country that still counts in pounds. It has eight significant digits and no hidden remainder, so a converter using it is exact for whatever you type.
For ounces below a pound, lbs to oz splits a weight into sixteenths, and kg to lbs reverses this page.
Lbs to kg questions
How many kilograms is one pound?
Exactly 0.45359237 kg, about 454 g.
What is 150 lb in kg?
About 68.04 kg.
How do I convert pounds and ounces to kg?
Divide the ounces by 16 and add them to the pounds, then multiply by 0.45359237. 8 lb 4 oz is 8.25 lb, which is about 3.742 kg.
What does lbs stand for?
It comes from the Latin libra, a Roman unit of weight. The s marks the plural in everyday writing, although style guides write lb for both one and many.