BMI calculator
Calculate body mass index and health category
Calculate
Results
Enter values and click Calculate to see results
Understanding the BMI calculator
Our free online tool helps you calculate body mass index and health category quickly and accurately.
Formula: BMI = weight (kg) / [height (m)]²
How it works:
This BMI calculator uses the standard formula to assess body fat based on weight and height. It divides weight in kilograms by height in meters squared. The result is then compared against health categories: Underweight (<18.5), Normal (18.5-24.9), Overweight (25-29.9), and Obese (30+).
BMI calculator examples and use cases
Calculate BMI from height and weight.
Use BMI as a quick screening estimate before speaking with a health professional.
Track weight category changes over time.
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FAQs
How do I use the BMI calculator?
Enter the values requested in the form and click Calculate. The tool works without login and shows results immediately.
What is the BMI calculator used for?
It helps you calculate body mass index and health category for planning, comparison, and quick estimates.
How does this calculator work?
This BMI calculator uses the standard formula to assess body fat based on weight and height. It divides weight in kilograms by height in meters squared. The result is then compared against health categories: Underweight (<18.5), Normal (18.5-24.9), Overweight (25-29.9), and Obese (30+).
Are CalculatorBest calculators free?
Yes. CalculatorBest calculators are free online tools and do not require an account.