Free Tool

Know your body,
know your health

Calculate your Body Mass Index in seconds. Accurate, free, and private — nothing leaves your browser.

Height

Enter a valid height (50–280 cm)

Weight

Enter a valid weight (10–500 kg)

Age (optional)

yrs

Category

Your BMI

—

Ideal range

—

BMI 18.5–24.9

Ideal weight

—

for your height

BMI range

Underweight <18.5 Normal 18.5–24.9 Overweight 25–29.9 Obese ≥30

Health insight

—

Healthy weight range for your height

—

BMI categories — at a glance

Category	BMI range	Health risk
Underweight	< 18.5	Malnutrition risk
Normal weight	18.5 – 24.9	Minimal
Overweight	25.0 – 29.9	Moderate
Obese Class I	30.0 – 34.9	High
Obese Class II	35.0 – 39.9	Very high
Obese Class III	≥ 40.0	Extremely high

BMI is a screening tool, not a diagnostic measure. It does not account for muscle mass, bone density, or body composition. Consult a healthcare professional for a full health assessment.