BMI Calculator
Unit
Metric
Imperial

Calculate your Body Mass Index (BMI) instantly using your height and weight. This free BMI calculator tells you whether you are underweight, normal, overweight, or obese based on standard BMI categories. Track your health and fitness progress with accurate BMI measurements.

How to Use

How to Use the BMI Calculator

Step 1: Select Your Unit

Choose between metric (kg/cm) or imperial (lbs/feet/inches). Enter your weight and height, then click Calculate to see your BMI instantly.

Step 2: Interpret Your BMI Result

Your BMI is categorized as Underweight (below 18.5), Normal (18.5-23), Overweight (23-25), Obese Class 1 (25-30), and Obese Class 2+ (above 30). The color-coded gauge shows your category at a glance.

Step 3: Check Your Healthy Weight Range

The calculator shows your healthy weight range based on a BMI of 18.5 to 23. Use this range as a reference for your health and fitness plan.

Key Features

  • Supports both metric and imperial units
  • Color-coded BMI gauge for intuitive results
  • Automatic healthy weight range calculation
  • Mobile-optimized responsive design
  • No installation required - works in browser
  • Completely free with no usage limits

Common Uses

  • Personal health assessment and weight management
  • Exercise and diet planning
  • Weight loss progress tracking
  • Basic health data check before medical consultations

Frequently Asked Questions

Q: How accurate is the BMI calculation?
A: BMI is a simple measure based on height and weight only. It may be less accurate for individuals with high muscle mass or pregnant women. Consult a healthcare professional for a comprehensive health assessment.

Q: Is BMI 23 in the normal range?
A: Yes, this calculator uses Asian standards (BMI 18.5-23 normal). It differs from Western standards (18.5-25), so check which standard applies to you.

Q: Can I use this BMI calculator for weight loss goals?
A: Yes. You can see the weight corresponding to a healthy BMI range and set a target. However, don't rely solely on BMI - combine it with a balanced diet and exercise.