Free Body Fat & BMI Calculator
Calculate BMI, body fat percentage, estimated calorie needs, fitness category, and ideal body composition instantly.
Estimated Results
Your Health Snapshot
BMI
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Body Fat
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BMI Method
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Calories
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BMI estimates body weight relative to height, while body fat percentage estimates actual fat composition using multiple calculation methods.
Ideal Body Fat Range
Men: 10% - 20%
Women: 18% - 28%
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Explore Whistly →What is BMI?
BMI (Body Mass Index) is a simple calculation using your height and weight to estimate whether your body weight falls within a healthy range.
What is Body Fat Percentage?
Body fat percentage estimates how much of your total body weight comes from fat tissue. It gives a more accurate fitness picture than weight alone.