A simple health reference
BMI Calculator
Calculate your Body Mass Index (BMI) using your weight and height!
Calculate your BMI
Start with your height and weight
Enter your current measurements to calculate your body mass index.
Your BMI Results
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What BMI measures
Body Mass Index compares body weight with height squared. It is a quick population-level screening reference, not a direct measurement of body fat or health.
How to interpret the number
Adult BMI categories provide broad context for the result. They can be useful as one starting point, but an individual number should be considered alongside health history, body composition, waist measurements, and changes over time.
What BMI does not show
BMI cannot distinguish muscle, fat, bone, or fluid. People with substantial muscularity may receive a higher result without having the body-fat level the category might imply, while people with the same BMI can have different body compositions.
How FitCalc calculates BMI
FitCalc converts the entered measurements to kilograms and metres, then divides weight in kilograms by height in metres squared. The result is educational and does not diagnose a medical condition.