You can find out how much someone weighs in both pounds and kilograms. In Europe, the pound is the unit of measure for weight. The website lbs-to-kg-co.uk has made it very easy to convert between pounds and kilograms. To convert pounds to kilograms, just put the right numbers in the right places on https://www.lbs-to-kg.co.uk/. X kg = (2.205x) lbs is the equation for converting kilograms to pounds. To turn the amount into pounds, multiply it by 2.205.