A kilogram (kg) is a metric unit of mass, and a pound (lb) is an English or imperial unit for force. However, both are frequently used to describe weight, and it is important to know how to convert one to the other. Converting kilograms to pounds can be done quickly on a calculator, or it can be estimated.
- Understand the conversion rate
There are 2.2046 pounds in every 1 kilogram, meaning that a single kilogram of matter is heavier than a single pound of it. To convert 1 kilogram to an unknown number of pounds, set up an equation that cancels the kilograms. Because 2.2046lb = 1kg, the expression 2.2046lb/1kg can be multiplied by any number of kilograms to convert them to pounds. In the expression 1kg * 2.2046lb / 1kg, the 1kg in both the numerator and denominator cancel each other out.
- Multiply or estimate
If you need a precise calculation, use a calculator or sheet of paper and multiply by exactly 2.2046. 200kg * 2.2046lb / 1kg = 440.92lb If you do not need an exact measurement and are okay with some approximation, multiply by 2.2 or even by 2 and assume your calculation is low.
- Check your answer
Perform the conversion in reverse to see if you can get your original number again. Also, inspect your result to see if it makes sense. There should be more than twice as many pounds as there are kilograms.