Measure your weight in kilograms
Measure your height in meters
Multiply your height by itself to get height squared
Divide your weight by your height squared
Use the formula: BMI = weight (kg) ÷ height (m)²
If using pounds and inches, use the formula: BMI = [weight (lb) ÷ height (in)²] × 703
Compare the result with standard BMI categories if needed