To convert 46 kilograms to pounds, divide the number of kilograms by 0.45359237, according to Conversion of Measurement Units. Since a kilogram is equal to roughly 2.2 pounds, 46 kilograms equals approximately 101.3 pounds. For this purpose, you can round 0.4539237 to 0.4539.
Check the conversion tables
The first step is to find the kilogram-to-pound equivalency; 1 pound equals roughly 2.2 kilograms, and 1 kilogram is roughly 0.4539 pounds. This information is available from Conversion of Measurement Units.
Have a calculator handy
With this information, take the number of kilograms you wish to convert (46) and divide it by 0.4539237 (rounded to 0.4539) to get the pound equivalent, or you can take the number of pounds to be converted and multiply times 2.2. Be careful to keep the decimal points in the right place; 0.45 is very different, for instance, from 04.5.
Check your math by reversing the process
Because of the specificity of the equation (0.4539237 kilograms to 1 pound), multiplying that number by a fairly large amount may result in inaccuracies. To avoid rounding errors, check the equation by performing the calculation backwards. So if you have calculated the number of pounds in 46 kilograms, go back and calculate the number of kilograms in 101.3 pounds by dividing 101.3 by 2.2. If the answer is 46, you know your calculations are correct.