How to convert pounds to kilograms
Multiply the weight in pounds by 0.45359237. One pound is defined as exactly 0.45359237 kg, so 150 lb × 0.45359237 = 68.04 kg and 200 lb = 90.72 kg. If you have pounds and ounces, turn the ounces into pounds first by dividing by 16: 7 lb 8 oz is 7.5 lb, which is 3.4 kg.
The “Also equals” panel shows the result in grams, the weight in ounces, and in stone and pounds. Use the ⇄ button to switch to kg to lbs.
Pounds to kilograms chart
| Pounds | Kilograms | Grams |
|---|---|---|
| 1 lb | 0.45 kg | 454 g |
| 2 lb | 0.91 kg | 907 g |
| 5 lb | 2.27 kg | 2,268 g |
| 10 lb | 4.54 kg | 4,536 g |
| 15 lb | 6.8 kg | 6,804 g |
| 20 lb | 9.07 kg | 9,072 g |
| 25 lb | 11.34 kg | 11,340 g |
| 35 lb | 15.88 kg | 15,876 g |
| 45 lb | 20.41 kg | 20,412 g |
| 50 lb | 22.68 kg | 22,680 g |
| 100 lb | 45.36 kg | 45,359 g |
| 125 lb | 56.7 kg | 56,699 g |
| 135 lb | 61.23 kg | 61,235 g |
| 150 lb | 68.04 kg | 68,039 g |
| 175 lb | 79.38 kg | 79,379 g |
| 185 lb | 83.91 kg | 83,915 g |
| 200 lb | 90.72 kg | 90,718 g |
| 225 lb | 102.06 kg | 102,058 g |
| 250 lb | 113.4 kg | 113,398 g |
| 300 lb | 136.08 kg | 136,078 g |
Where you will use this conversion
- US body weight on forms, medical records and fitness apps
- Gym plates and barbells: a 45 lb plate is 20.41 kg
- Airline limits quoted in pounds: 50 lb is 22.68 kg
- Baby weights, which are usually given in pounds and ounces
- Recipes, produce and bulk goods sold by the pound
Good to know
A quick estimate is to halve the pounds and then take off 10% of that: 150 lb gives 75 − 7.5 = 67.5 kg, against an exact 68.04 kg. The international pound was fixed at exactly 0.45359237 kg in 1959, so the conversion carries no rounding error beyond the digits shown. To go the other way, see kilograms to pounds.
Frequently asked questions
How many kilograms are in a pound?
One pound equals exactly 0.45359237 kilograms. To convert pounds to kilograms, multiply by 0.45359237.
How many kg is 150 lbs?
150 pounds is 68.04 kilograms.
How many kg is 200 lbs?
200 pounds is 90.72 kilograms.
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. For example, 7 lb 8 oz is 7.5 lb, which is 3.4 kg.