BMI Calculator

Use this BMI Calculator to quickly determine your Body Mass Index (BMI) and find out whether you are underweight, normal, overweight, or obese. This tool gives fast results and helps you track your health.

Enter your height and weight, click calculate, and get your BMI instantly.

BMI Categories:
Underweight: <18.5 · Normal: 18.5–24.9 · Overweight: 25–29.9 · Obese: ≥30
Tip: Maintain a healthy BMI to reduce risk of chronic diseases. Combine balanced diet with regular exercise.

How the BMI Calculator Works

BMI is a simple way to understand your weight relative to your height.

  • If you use kilograms and meters, BMI is calculated by dividing your weight (kg) by the square of your height in meters.
  • If you use pounds and inches, BMI is calculated by multiplying your weight (lb) by 703 and then dividing by the square of your height in inches.

The calculator does all the math for you and shows your BMI along with the category you fall into.

How to Use the BMI Calculator

  1. Select your unit system: Metric (kg/cm) or US (lb/in).
  2. Enter your weight.
  3. Enter your height.
  4. Click Calculate to get your BMI and category instantly.

BMI Categories

  • Underweight: BMI less than 18.5
  • Normal weight: BMI between 18.5 and 24.9
  • Overweight: BMI between 25 and 29.9
  • Obese: BMI 30 or higher

Why Use This BMI Calculator?

  • Fast and accurate BMI calculation
  • Works for both metric and US units
  • Helps track weight and health goals
  • Free and mobile-friendly
  • Easy for everyone to use
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