You don’t need to be a math whiz to calculate BMI. Just grab your calculator and use one of the two basic BMI formulas. It doesn’t matter which formula you use since they both end up with the same BMI -- so you make the call.
Formula 1: BMI = Weight (pounds) ÷ Height (inches) ÷ Height (inches) × 703
Formula 2: BMI = Weight (kilograms) ÷ Height (centimeters) ÷ Height (centimeters) × 10,000
Note: After you have done the math, round off the BMI to the nearest whole number.