BMI Calculator
Calculate your Body Mass Index (BMI) instantly using metric or imperial measurements. Find your weight category and healthy weight range.
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BMI Categories (WHO Standard)
Below 18.5
Underweight
18.5 – 24.9
Normal weight
25.0 – 29.9
Overweight
30.0 – 34.9
Obese Class I
35.0 – 39.9
Obese Class II
40.0 and above
Obese Class III
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Frequently Asked Questions
What is BMI?
BMI (Body Mass Index) is a measure of body fat based on height and weight. It's calculated by dividing your weight in kilograms by the square of your height in metres (kg/m²). It's widely used by healthcare professionals as a quick screening tool for weight categories.
Is BMI accurate?
BMI is a useful general screening tool but has limitations. It doesn't directly measure body fat or account for muscle mass, age, sex, or ethnic background. Athletes with high muscle mass may have a high BMI without excess fat. Always consult a healthcare professional for a full health assessment.
What is a healthy BMI?
According to the World Health Organisation (WHO), a BMI between 18.5 and 24.9 is considered a healthy weight range for most adults. Below 18.5 is underweight, 25–29.9 is overweight, and 30 or above is classified as obese.
Is my data stored?
No. All calculations happen entirely in your browser. No personal data is ever sent to a server or stored anywhere.
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