How is BMI calculated?

BMI = weight in kilograms divided by height in meters squared. For imperial units, the formula is: BMI = (weight in pounds × 703) / (height in inches)².

Is BMI accurate for everyone?

BMI is a general screening tool and may not be accurate for athletes (who have more muscle mass), elderly people, or children. It does not account for body composition, age, sex, or ethnicity.

What is a healthy BMI?

A BMI between 18.5 and 24.9 is generally considered healthy for adults. However, optimal BMI can vary based on individual factors. Consult a healthcare provider for personalized advice.

Does this tool store my data?

No. All calculations happen in your browser. Your height and weight are never sent to any server.

BMI Calculator

Calculate your Body Mass Index (BMI) using metric or imperial units. Get instant results with your health category.

Height (cm)

Weight (kg)

BMI Categories

Category	BMI Range
Underweight	Below 18.5
Normal weight	18.5 – 24.9
Overweight	25.0 – 29.9
Obese	30.0 and above

What Is BMI?

Body Mass Index (BMI) is a simple measure using height and weight to estimate body fat. The formula is: BMI = weight (kg) / height (m)². While widely used for general health screening, BMI does not distinguish between muscle and fat mass and should not be the sole indicator of health.

Frequently Asked Questions

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