This lbs to kg converter turns pounds into kilograms as you type, using the exact definition of the pound. People reach for it to read a doctor’s scale in another country, to log a lift at the gym, to check a baggage allowance or to follow a weight goal written in the other system. It runs in your browser and spends no credits.
How many kg is a pound
One pound is exactly 0.45359237 kilograms, a little less than half a kilo. Going the other way, one kilogram is about 2.2046 pounds. The pound has been defined this way since 1959, so the number is not an estimate.
Lbs to kg formula
Multiply the pounds by 0.45359237:
kg = lb × 0.45359237
A quick mental shortcut is to halve the pounds and take off 10 percent of that: 200 lb, halved, is 100, minus 10 is 90 kg. The exact answer is 90.7185 kg, so the shortcut lands within about one percent.
Pounds to kilograms table
| Pounds | Kilograms |
|---|---|
| 1 lb | 0.4536 kg |
| 5 lb | 2.2680 kg |
| 10 lb | 4.5359 kg |
| 20 lb | 9.0718 kg |
| 50 lb | 22.6796 kg |
| 100 lb | 45.3592 kg |
| 120 lb | 54.4311 kg |
| 135 lb | 61.2350 kg |
| 150 lb | 68.0389 kg |
| 160 lb | 72.5748 kg |
| 175 lb | 79.3787 kg |
| 180 lb | 81.6466 kg |
| 200 lb | 90.7185 kg |
| 220 lb | 99.7903 kg |
| 250 lb | 113.3981 kg |
Worked example: body weight and luggage
Someone who weighs 165 lb fills in a form that asks for kilograms: 165 × 0.45359237 = 74.84 kg. At the airport the numbers run the other way. Many airlines set the checked bag limit at 23 kg, which is 50.71 lb, so a bag that reads 50 lb on a home scale is just inside it. A 32 kg heavy bag allowance works out to 70.55 lb.
Lbs vs kg at the gym
Plates in many gyms are marked in pounds, while competition plates are in kilograms. A 45 lb plate is 20.41 kg, close to but not the same as a 20 kg plate. Type your total in either box to see the exact figure before you log it.
FAQ
Is 1 kg 2.2 lbs?
Roughly. 1 kg is 2.2046 lb. Using 2.2 is fine for a quick guess, but on 100 kg it is off by about 0.46 lb.
Can I convert to stone?
Yes. Pick stone in the unit list on either side. One stone is 14 lb.
What does it cost?
It comes with the Nexin library: Nexin Lite or Nexin Pro opens it, and it spends no credits.
