LBS to KG converter
1 lb = 0.45359237 kg
Multiply pounds by 0.453 592 37 for an exact result. Airlines, doctors outside the US and most recipes printed abroad will want kilograms.
150 lb = 68.0388555 kg
Formula: kg = lb ÷ 2.20462262185
150 lb in every weight unit
- milligram
- gram
- kilogram
- tonne
- ounce
- stone
- short ton (US)
- long ton (UK)
How to convert pounds to kilograms
kg = lb ÷ 2.20462262185
Example: 150 lb × 0.45359237 = 68.0388555 kg.
pound: 1 lb = 0.453 592 37 kg exactly (NIST SP 811, App. B (1959 yard & pound agreement))
kilogram: SI base unit, fixed by the Planck constant (BIPM SI Brochure)
Going the other way? Use the kg to lbs converter.
Where the number 0.45359237 comes from
Nothing is measured here. Every step below is a definition written into law or into the SI.
1 lb
LBS to KG table
| pounds (lb) | kilograms (kg) |
|---|---|
| 1 | 0.4535924 |
| 2 | 0.9071847 |
| 5 | 2.267962 |
| 10 | 4.535924 |
| 15 | 6.803886 |
| 20 | 9.071847 |
| 25 | 11.33981 |
| 30 | 13.60777 |
| 40 | 18.14369 |
| 50 | 22.67962 |
| 60 | 27.21554 |
| 70 | 31.75147 |
| 80 | 36.28739 |
| 90 | 40.82331 |
| 100 | 45.35924 |
| 110 | 49.89516 |
| 120 | 54.43108 |
| 130 | 58.96701 |
| 140 | 63.50293 |
| 150 | 68.03886 |
| 160 | 72.57478 |
| 170 | 77.1107 |
| 180 | 81.64663 |
| 190 | 86.18255 |
| 200 | 90.71847 |
| 220 | 99.79032 |
| 250 | 113.3981 |
| 300 | 136.0777 |
Questions
How many kilograms are in 1 pound?
1 lb = 0.45359237 kg.
What is the formula to convert pounds to kilograms?
kg = lb ÷ 2.20462262185. 1 lb = 0.453 592 37 kg exactly; SI base unit, fixed by the Planck constant.
Is this conversion exact?
Yes. Both units are defined exactly (NIST SP 811, App. B (1959 yard & pound agreement); BIPM SI Brochure), so the factor is exact and results are only rounded for display.
What is 150 lb in kg?
150 lb = 68.0388555 kg.