BMI Calculator
Calculate your Body Mass Index (BMI) instantly with our free online BMI calculator. Supports both metric and imperial units. Find out if you're at a healthy weight.
BMI Categories: Underweight (<18.5) | Normal (18.5-24.9) | Overweight (25-29.9) | Obese (≥30)
BMI Categories
UnderweightBMI < 18.5
Normal WeightBMI 18.5 - 24.9
OverweightBMI 25 - 29.9
Obese (Class I)BMI 30 - 34.9
Obese (Class II+)BMI ≥ 35
How is BMI Calculated?
BMI = weight (kg) / height (m)²
For example, if you weigh 70 kg and are 1.75 m tall:
BMI = 70 / (1.75 × 1.75) = 70 / 3.0625 = 22.9