Pounds to Kilograms
One pound equals 0.453592 kilograms.
Kilograms = pounds ÷ 2.2046226218
Weight & Mass Conversion Calculator
Common Weight Conversions
Weight & Mass Units Reference
Metric System
- 1 t = 1,000 kg
- 1 kg = 1,000 g
- 1 g = 1,000 mg
- 1 ct = 200 mg
Imperial System
- 1 ton (US) = 2,000 lb
- 1 ton (UK) = 2,240 lb
- 1 st = 14 lb
- 1 lb = 16 oz
Key Conversions
- 1 kg = 2.205 lb
- 1 oz = 28.35 g
- 1 st = 6.35 kg
- 1 gr = 64.8 mg
Pounds to Kilograms Conversion Table
| lb | kg |
|---|---|
| 1 | 0.4536 |
| 2 | 0.9072 |
| 5 | 2.268 |
| 10 | 4.5359 |
| 20 | 9.0718 |
| 45 | 20.4117 |
| 50 | 22.6796 |
| 100 | 45.3592 |
| 120 | 54.4311 |
| 140 | 63.5029 |
| 150 | 68.0389 |
| 160 | 72.5748 |
| 180 | 81.6466 |
| 200 | 90.7185 |
| 250 | 113.3981 |
About This Conversion
Pounds to kilograms is needed for US body weights, shipping weights and gym equipment specified in imperial. The conversion is exact in this direction, since the pound is defined as 0.45359237 kg rather than measured against it.
Weightlifting is a place where the conversion is deliberately not applied. Olympic plates are metric, so a 45 lb plate is really a 20 kg plate weighing 44.09 lb. Loading a bar by converting imperial numbers gives a total that is consistently a couple of pounds light.
Frequently Asked Questions
How many kilograms are in a pound?
One pound is exactly 0.45359237 kilograms, usually rounded to 0.4536.
How many kg is 150 lb?
150 pounds is 68.04 kilograms.
Is a 45 lb plate really 45 pounds?
Usually not. Most gyms use 20 kg Olympic plates, which weigh 44.09 lb.
How do I convert pounds to kg quickly?
Halve the pounds, then subtract ten percent. For 150 lb: 75 − 7.5 = 67.5, against a true 68.0 kg.
Worth Knowing
Ton vs Tonne
A US short ton is 2,000 pounds (907.18 kg), a UK long ton is 2,240 pounds (1,016.05 kg), and a metric tonne is 1,000 kilograms (2,204.62 lb).
Fluid Ounce vs Ounce
A US fluid ounce is 29.5735 millilitres of volume, while an ounce is 28.3495 grams of mass; there is no fixed conversion between them.
Troy Ounce vs Ounce
A troy ounce is 31.1034768 grams, roughly 9.7 percent heavier than the avoirdupois ounce of 28.349523125 grams used for everything else.
Weight Conversion Chart
70 kg is 154.3 lb, which is 11 st 0.3 lb; 80 kg is 176.4 lb, or 12 st 8.4 lb.
Cups to Grams for Baking
One US cup holds about 125 g of plain flour, 200 g of granulated sugar, 227 g of butter and 340 g of honey.
Related Conversions
Converting the other way? Kilograms to Pounds
Need a different unit? Open the full weight converter