BMI Calculator
Use this free BMI calculator to find your Body Mass Index based on height and weight. Understand your weight category — underweight, normal, overweight, or obese — in seconds.
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How it works
This bmi calculator runs entirely in your browser — no data is sent to any server. Simply fill in the fields above and the result updates instantly. You can copy the output with the copy button provided.
Frequently Asked Questions
What is BMI?
BMI (Body Mass Index) is a measure of body fat based on height and weight. It is calculated as weight (kg) divided by height (m) squared.
What is a normal BMI range?
A BMI between 18.5 and 24.9 is considered normal weight. Below 18.5 is underweight, 25–29.9 is overweight, and 30 or above is obese.
Is BMI accurate for everyone?
BMI is a useful screening tool but doesn't measure body fat directly. It may not be accurate for athletes, elderly people, or those with high muscle mass.
How is BMI calculated?
BMI = weight (kg) ÷ height (m)². For example, a person weighing 70kg at 1.75m has a BMI of 22.9.
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