BMI Calculator
Body Mass Index (BMI) is a measure of body fat based on height and weight. Use this calculator to find your BMI and see which weight category you fall into.
How the bmi calculator Works
This tool uses the following formulas to compute results:
Metric: BMI = weight (kg) / (height (m))²Imperial: BMI = 703 × weight (lb) / (height (in))²Categories: Underweight <18.5, Normal 18.5–24.9, Overweight 25–29.9, Obese ≥30
About BMI Calculator
Body Mass Index (BMI) is a measure of body fat based on height and weight. Use this calculator to find your BMI and see which weight category you fall into.
Use the inputs above to calculate your result instantly. Results update automatically as you type. All calculations happen in your browser, so your data is never sent to a server.
Frequently Asked Questions
What is a healthy BMI?
A BMI between 18.5 and 24.9 is generally considered healthy for most adults. Values outside this range may indicate underweight or overweight status.
Is BMI accurate for athletes?
BMI does not distinguish between muscle and fat. Very muscular individuals may have a high BMI without excess body fat.
Does BMI apply to children?
BMI for children is interpreted using age- and sex-specific percentiles, not the adult categories shown here.
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