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FitCiCalculators › BMI Calculator

BMI Calculator

Enter height and weight to see your body mass index and the healthy weight range for your height.

WHO classesFree

Enter height and weight

What BMI does and does not tell you

Body mass index is weight divided by height squared (kg/m²). WHO classes: under 18.5 underweight, 18.5–24.9 normal, 25–29.9 overweight, 30 and above obese.

BMI cannot tell muscle from fat; a regular lifter can read as "overweight" at a healthy body-fat level. Waist circumference and progress photos are better guides; FitCi tracks both.

Go beyond the number

FitCi tracks weight, measurements and progress photos together, and builds your training and diet plan for your goal.