# Easiest way to calculate BMI .

Calculate BMI by dividing weight in pounds (lbs) by height in inches (in) squared and multiplying by a conversion factor of 703. To find your body mass index (BMI), multiply your weight in pounds by 705, then divide the result by your height in inches, then divide again by your height. The result is your BMI.

Then, calculate BMI by dividing weight in pounds (lb) by height in inches (in) squared and multiplying by a conversion factor of 703. When using a handheld calculator, if your calculator has a square function, divide weight (lb) by height (in) squared, multiply by 703, and round to one decimal place.