BMI Calculator — Body Mass Index (Metric)

Calculate your Body Mass Index from weight and height, with WHO category table.

Formula

BMI = weight (kg) / height (m)²

Examples

InputResult
70 kg, 175 cm22.9 (Normal)
55 kg, 160 cm21.5 (Normal)
95 kg, 170 cm32.9 (Obese)

Frequently Asked Questions

What is a healthy BMI?

The WHO classifies 18.5–24.9 as normal, 25–29.9 as overweight, 30+ as obese and below 18.5 as underweight.

Is BMI accurate for athletes?

Not always. BMI does not distinguish muscle from fat, so very muscular people may be classified as overweight.

Is BMI a medical diagnosis?

No. It is a screening number; consult a professional for health advice.

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