BMI Calculator
Calculate Body Mass Index and find your weight category.
About BMI Calculator
Calculate your Body Mass Index (BMI) using weight and height in metric or imperial units. See which category your BMI falls in (Underweight, Normal, Overweight, Obese) and the healthy weight range for your height.
Use Cases
Health screening, fitness tracking, medical form requirements, understanding weight goals, comparing BMI over time.
How It Works
BMI = weight (kg) / height² (m²). For imperial: BMI = 703 × weight (lbs) / height² (inches²). Categories: <18.5 Underweight, 18.5–24.9 Normal, 25–29.9 Overweight, ≥30 Obese.
Frequently Asked Questions
Is BMI an accurate health measure?
BMI is a screening tool, not a diagnostic measure. It does not account for muscle mass, bone density, or fat distribution. Consult a doctor for full health assessment.
What is a healthy BMI range?
The WHO defines 18.5–24.9 as the healthy range for most adults. Ranges differ slightly for Asian populations (23+ as overweight).