KG to LBS Converter
ConversionsChoose a direction and enter the weight. The converter uses the exact definition of the pound, 0.45359237 kg, and shows pounds to kilograms with grams as well. A chart of common weights follows below.
Step by step
70 / 0.45359237 = 154.324 lb
- Divide by the conversion factor: 70 / 0.45359237 = 154.324 lb.
- In 500 gram units: 70 / 0.5 = 140.
Once every entry is valid, you’ll see each step of the calculation here.
Formula
- lb
- weight in pounds (avoirdupois)
- kg
- weight in kilograms
- 0.45359237
- kilograms per pound, exact by definition
How it works
The pound used in the United States, the avoirdupois pound (lb), has been defined as exactly 0.45359237 kilograms since the international yard and pound agreement of 1959. To convert pounds to kilograms, multiply by 0.45359237: 150 lb are 68.039 kg. To convert kilograms to pounds, divide by 0.45359237, which is the same as multiplying by about 2.20462: 70 kg are 154.324 lb.
For a quick estimate in your head, kilograms are a bit less than half the pounds: take half the pounds and subtract 10% of that half. 200 lb: half is 100, minus 10 is 90 kg (exactly 90.72 kg). The other way, double the kilograms and add 10%: 50 kg, doubled 100, plus 10 is 110 lb (exactly 110.23 lb).
A pound has 16 ounces, so a decimal result such as 154.32 lb is 154 lb plus 0.32 × 16 = 5.1 oz. In the kilograms to pounds direction the converter also shows the count of 500 gram units, the “metric pound” still used in some European countries; it has nothing to do with the US pound. For body weight together with height, see the BMI calculator.
The formula
The factor 2.20462 is rounded; 1 / 0.45359237 is 2.2046226218... The converter divides by the exact factor, so even large weights come out right to the shown decimals.
Stone, a British unit for body weight, is 14 pounds or 6.35029318 kg. A person of 11 stone 6 pounds weighs 160 lb or 72.57 kg.
Example
Your luggage limit is 23 kg. How many pounds is that?
- Divide by 0.45359237: 23 / 0.45359237 = 50.706 lb.
- That is slightly more than the 50 lb checked bag limit common on US airlines, since 50 lb are 22.68 kg.
23 kg is 50.706 lb.
Load this example into the calculatorPounds to kg chart
| Weight in pounds | In kilograms |
|---|---|
| 1 lb | 0.454 kg |
| 2 lb | 0.907 kg |
| 3 lb | 1.361 kg |
| 4 lb | 1.814 kg |
| 5 lb | 2.268 kg |
| 6 lb | 2.722 kg |
| 7 lb | 3.175 kg |
| 8 lb | 3.629 kg |
| 9 lb | 4.082 kg |
| 10 lb | 4.536 kg |
| 15 lb | 6.804 kg |
| 20 lb | 9.072 kg |
| 25 lb | 11.34 kg |
| 30 lb | 13.608 kg |
| 35 lb | 15.876 kg |
| 40 lb | 18.144 kg |
| 45 lb | 20.412 kg |
| 50 lb | 22.68 kg |
| 55 lb | 24.948 kg |
| 60 lb | 27.216 kg |
| 65 lb | 29.484 kg |
| 70 lb | 31.751 kg |
| 75 lb | 34.019 kg |
| 80 lb | 36.287 kg |
| 85 lb | 38.555 kg |
| 90 lb | 40.823 kg |
| 95 lb | 43.091 kg |
| 100 lb | 45.359 kg |
| 110 lb | 49.895 kg |
| 120 lb | 54.431 kg |
| 130 lb | 58.967 kg |
| 140 lb | 63.503 kg |
| 150 lb | 68.039 kg |
| 160 lb | 72.575 kg |
| 170 lb | 77.111 kg |
| 180 lb | 81.647 kg |
| 190 lb | 86.183 kg |
| 200 lb | 90.718 kg |
| 220 lb | 99.79 kg |
| 250 lb | 113.398 kg |
| 300 lb | 136.078 kg |
Frequently asked questions
How many pounds are in a kilogram?
One kilogram is 2.20462 pounds (exactly 1 / 0.45359237). So 5 kg are 11.02 lb, 10 kg are 22.05 lb, 50 kg are 110.23 lb and 100 kg are 220.46 lb.
How do I convert lbs to kg?
Multiply the pounds by 0.45359237, or divide by 2.20462. 150 lb are 68.04 kg, 180 lb are 81.65 kg and 200 lb are 90.72 kg. A quick estimate: halve the pounds and take off 10% of that half.
How do I turn decimal pounds into pounds and ounces?
Keep the whole pounds and multiply the decimal part by 16, because a pound has 16 ounces. 7.25 lb are 7 lb plus 0.25 × 16 = 4 oz. A newborn of 3.5 kg weighs 7.716 lb, which is 7 lb 11.5 oz.
Is lb the same as lbs?
Yes. Both stand for pound, from the Latin “libra”. The official symbol is lb for one or many pounds; lbs is a common plural spelling in everyday writing.
Is a UK pound the same weight as a US pound?
Yes. Since 1959 the pound is 0.45359237 kg in both countries. The UK often states body weight in stone (14 lb), but the pound itself is identical.
- SI Units: Mass (National Institute of Standards and Technology)
- NIST Guide to the SI, Appendix B: Conversion Factors (National Institute of Standards and Technology)
- Pound (mass) (Wikipedia)