BMI Calculator
Calculate your Body Mass Index with our free online BMI calculator. Understand weight categories instantly with this accurate health calculator tool.
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Body Mass Index — Live
Drag sliders to see your BMI update instantly.
70.0 kg
30 kg200 kg
💡 Healthy weight for 175 cm: 57–76 kg
175 cm
120 cm220 cm
Your BMI
22.9
Healthy Range
57–76 kg
BMI ScaleNormal
22.9 — Normal Weight
Underweight
Normal
Overweight
Obese
What is BMI?
Body Mass Index (BMI) is a simple calculation using a person's height and weight. The formula is BMI = kg/m², where kg is weight in kilograms and m² is height in meters squared.
BMI Categories
- Underweight: BMI less than 18.5
- Normal weight: BMI 18.5–24.9
- Overweight: BMI 25–29.9
- Obese: BMI 30 or greater
BMI Formula
BMI = Weight (kg) ÷ Height² (m²)
For imperial units: BMI = [Weight (lbs) ÷ Height² (in²)] × 703