Free Health Calculator

BMI Calculator — Body Mass Index

Find out if your weight is in a healthy range for your height. Instant results, no signup required.

Calculate BMI ↓

Enter your measurements

BMI is calculated as weight (kg) divided by height (m) squared.

Your BMI
Underweight Normal Overweight Obese
Healthy weight min
Healthy weight max

BMI categories explained

<18.5

Underweight

May indicate nutritional deficiency. Consider consulting a doctor.

18.5–24.9

Normal weight

Associated with the lowest health risks for most adults.

25–29.9

Overweight

Slightly elevated health risk. Diet and exercise are typically recommended.

≥30

Obese

Associated with increased risk of heart disease, diabetes, and other conditions.

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