How do you convert pounds to kilograms?
Divide the number of pounds by 2.2046. A reliable mental shortcut: take half, then subtract 10%: 150 lb → 75 − 7.5 = 67.5 kg, against an exact 68.0 kg.
pounds = kilograms × 2.2046
Common weights in pounds and kilograms
| 1 lb | 0.45 kg |
| 5 lb | 2.27 kg |
| 10 lb | 4.54 kg |
| 20 lb | 9.07 kg |
| 25 lb | 11.34 kg |
| 50 lb (US checked bag) | 22.68 kg |
| 75 lb | 34.02 kg |
| 100 lb | 45.36 kg |
| 150 lb | 68.04 kg |
| 180 lb | 81.65 kg |
| 200 lb | 90.72 kg |
Show every value
- 1 lb = 0.4536 kg
- 2 lb = 0.9072 kg
- 3 lb = 1.3608 kg
- 4 lb = 1.8144 kg
- 5 lb = 2.268 kg
- 6 lb = 2.7216 kg
- 7 lb = 3.1751 kg
- 8 lb = 3.6287 kg
- 9 lb = 4.0823 kg
- 10 lb = 4.5359 kg
- 11 lb = 4.9895 kg
- 12 lb = 5.4431 kg
- 13 lb = 5.8967 kg
- 14 lb = 6.3503 kg
- 15 lb = 6.8039 kg
- 16 lb = 7.2575 kg
- 17 lb = 7.7111 kg
- 18 lb = 8.1647 kg
- 19 lb = 8.6183 kg
- 20 lb = 9.0718 kg
- 21 lb = 9.5254 kg
- 22 lb = 9.979 kg
- 23 lb = 10.4326 kg
- 24 lb = 10.8862 kg
- 25 lb = 11.3398 kg
- 26 lb = 11.7934 kg
- 27 lb = 12.247 kg
- 28 lb = 12.7006 kg
- 29 lb = 13.1542 kg
- 30 lb = 13.6078 kg
- 31 lb = 14.0614 kg
- 32 lb = 14.515 kg
- 33 lb = 14.9685 kg
- 34 lb = 15.4221 kg
- 35 lb = 15.8757 kg
- 36 lb = 16.3293 kg
- 37 lb = 16.7829 kg
- 38 lb = 17.2365 kg
- 39 lb = 17.6901 kg
- 40 lb = 18.1437 kg
- 41 lb = 18.5973 kg
- 42 lb = 19.0509 kg
- 43 lb = 19.5045 kg
- 44 lb = 19.9581 kg
- 45 lb = 20.4117 kg
- 46 lb = 20.8652 kg
- 47 lb = 21.3188 kg
- 48 lb = 21.7724 kg
- 49 lb = 22.226 kg
- 50 lb = 22.6796 kg
- 51 lb = 23.1332 kg
- 52 lb = 23.5868 kg
- 53 lb = 24.0404 kg
- 54 lb = 24.494 kg
- 55 lb = 24.9476 kg
- 56 lb = 25.4012 kg
- 57 lb = 25.8548 kg
- 58 lb = 26.3084 kg
- 59 lb = 26.7619 kg
- 60 lb = 27.2155 kg
- 61 lb = 27.6691 kg
- 62 lb = 28.1227 kg
- 63 lb = 28.5763 kg
- 64 lb = 29.0299 kg
- 65 lb = 29.4835 kg
- 66 lb = 29.9371 kg
- 67 lb = 30.3907 kg
- 68 lb = 30.8443 kg
- 69 lb = 31.2979 kg
- 70 lb = 31.7515 kg
- 71 lb = 32.2051 kg
- 72 lb = 32.6587 kg
- 73 lb = 33.1122 kg
- 74 lb = 33.5658 kg
- 75 lb = 34.0194 kg
- 76 lb = 34.473 kg
- 77 lb = 34.9266 kg
- 78 lb = 35.3802 kg
- 79 lb = 35.8338 kg
- 80 lb = 36.2874 kg
- 81 lb = 36.741 kg
- 82 lb = 37.1946 kg
- 83 lb = 37.6482 kg
- 84 lb = 38.1018 kg
- 85 lb = 38.5554 kg
- 86 lb = 39.0089 kg
- 87 lb = 39.4625 kg
- 88 lb = 39.9161 kg
- 89 lb = 40.3697 kg
- 90 lb = 40.8233 kg
- 91 lb = 41.2769 kg
- 92 lb = 41.7305 kg
- 93 lb = 42.1841 kg
- 94 lb = 42.6377 kg
- 95 lb = 43.0913 kg
- 96 lb = 43.5449 kg
- 97 lb = 43.9985 kg
- 98 lb = 44.4521 kg
- 99 lb = 44.9056 kg
- 100 lb = 45.3592 kg
- 125 lb = 56.699 kg
- 150 lb = 68.0389 kg
- 175 lb = 79.3787 kg
- 200 lb = 90.7185 kg
- 225 lb = 102.0583 kg
- 250 lb = 113.3981 kg
- 275 lb = 124.7379 kg
- 300 lb = 136.0777 kg
- 325 lb = 147.4175 kg
- 350 lb = 158.7573 kg
- 375 lb = 170.0971 kg
- 400 lb = 181.4369 kg
- 425 lb = 192.7768 kg
- 450 lb = 204.1166 kg
- 475 lb = 215.4564 kg
- 500 lb = 226.7962 kg
- 550 lb = 249.4758 kg
- 600 lb = 272.1554 kg
- 650 lb = 294.835 kg
- 700 lb = 317.5147 kg
- 750 lb = 340.1943 kg
- 800 lb = 362.8739 kg
- 850 lb = 385.5535 kg
- 900 lb = 408.2331 kg
- 950 lb = 430.9128 kg
- 1,000 lb = 453.5924 kg
- 1,500 lb = 680.3886 kg
- 2,000 lb = 907.1847 kg
- 2,500 lb = 1,133.9809 kg
- 3,000 lb = 1,360.7771 kg
- 3,500 lb = 1,587.5733 kg
- 4,000 lb = 1,814.3695 kg
- 4,500 lb = 2,041.1657 kg
- 5,000 lb = 2,267.9619 kg
- 5,500 lb = 2,494.758 kg
- 6,000 lb = 2,721.5542 kg
- 6,500 lb = 2,948.3504 kg
- 7,000 lb = 3,175.1466 kg
- 7,500 lb = 3,401.9428 kg
- 8,000 lb = 3,628.739 kg
- 8,500 lb = 3,855.5351 kg
- 9,000 lb = 4,082.3313 kg
- 9,500 lb = 4,309.1275 kg
- 10,000 lb = 4,535.9237 kg
1 avoirdupois pound = 0.45359237 kg exactly (1959 international agreement). Note that the troy pound, used only for precious metals, is 0.3732 kg and does not apply here. Methodology & sources.
Frequently asked questions
How many kilograms is 1 pound?
1 pound is 0.4536 kilogram. The exact value, 0.45359237 kg, is fixed by international convention rather than measured.
Are US and UK pounds the same?
Yes for the avoirdupois pound, harmonised between both countries since 1959. The UK additionally uses the stone (1 st = 14 lb = 6.35 kg) for body weight, which Americans do not.
What is 150 lb in kg and stone?
150 lb equals 68.04 kg, or 10 stone 10 pounds. British scales and medical records often show stone-and-pounds rather than a single figure.
Are a Zentner and a quintal the same?
No, and four units compete for the idea of a hundredweight. The German Zentner is 50 kg, the metric quintal 100 kg, the British hundredweight 50.80 kg and the American one 45.36 kg. An agricultural price quoted per hundredweight therefore means different things on either side of the Rhine or the Atlantic.
Why is gold weighed in different ounces?
Because precious metals use the troy system, separate from the avoirdupois system of everyday life. The troy ounce is 31.103 g against 28.35 g for the ordinary ounce, and the troy pound 373.24 g against 453.59 g. A gold price quoted per ounce always means troy ounces, a 10 % gap with the supermarket ounce.