The lbs to kg conversion factor
One kilogram equals 2.20462 pounds, so to convert pounds to kilograms you divide by 2.20462: kg = lb ÷ 2.20462. For example, 150 lb ÷ 2.20462 = 68.04 kg. To go back, use the kg to lbs calculator.
A quick mental method is to halve the pounds and take off ten per cent: half of 150 is 75, minus 7.5 is 67.5, close to the exact 68.04. The formal definition runs the other way — one pound is exactly 0.45359237 kg, so multiplying by 0.4536 gives the same result.
How to convert pounds to kilograms
Enter a weight in pounds and the calculator divides by 2.20462 to give kilograms. Handy for body weight, gym plates, and parcels. Two decimal places suits most uses.
Worked examples: a 45 lb Olympic plate is 20.41 kg, a 200 lb bodyweight is 90.72 kg, and a 50 lb airline bag limit is 22.68 kg, just under the 23 kg most airlines actually set.
Parcel carriers round up to the next whole or half kilogram, so a 22.68 kg bag is billed as 23 kg. Converting before you pack avoids paying for a rounding step you never used.
If you are checking your work, the ounces to grams calculator gives you a second reference point.
LBS to kg reference table
| Pounds | Kilograms |
|---|---|
| 1 lb | 0.45 kg |
| 10 lb | 4.54 kg |
| 150 lb | 68.04 kg |
| 200 lb | 90.72 kg |
Medical and shipping paperwork normally wants kilograms to one or two decimals, while gym and body weight figures round happily to the nearest half kilo. Watch out for US short tons: 2,000 lb is 907.18 kg, not the 1,000 kg of a metric tonne.
The pounds to tons calculator is the natural next step once you have this figure.
Frequently asked questions
- How many kg is 150 lbs?
- 150 pounds equals 68.04 kg (150 ÷ 2.20462).
- What is the lbs to kg formula?
- kilograms = pounds ÷ 2.20462, since 1 kg is 2.20462 lb.
- How many pounds are in a kilogram?
- One kilogram is about 2.20462 pounds.
- How do I convert kg back to pounds?
- Multiply kilograms by 2.20462, or use the kg to lbs calculator.
- How do I convert a weight given in pounds and ounces?
- Turn the ounces into a decimal first by dividing by 16, then convert. So 150 lb 8 oz is 150.5 lb, which comes to 68.27 kg. Typing 150.8 instead would be read as 150 lb 12.8 oz.