Measure height in meters (m)
Measure weight in kilograms (kg)
Use the formula: BMI = weight (kg) / (height (m) × height (m))
If height is in centimeters: convert to meters by dividing by 100
If weight is in pounds: convert to kilograms by multiplying by 0.45359237
Calculate BMI using the converted values
Round BMI to one decimal place (optional)