Body Mass Index (BMI) Calculator

Enter your height and weight to calculate your BMI and determine your health category.

BMI Categories

  • Underweight: Less than 18.5
  • Normal weight: 18.5 – 24.9
  • Overweight: 25 – 29.9
  • Obese: 30 or more

How BMI is Calculated

The formula used by this BMI calculator is:

BMI = Weight (kg) / [Height (m)]²


For example, if your weight is 70 kg and height is 1.75 m, your BMI is: 70 / (1.75 × 1.75) = 22.9

Advantages of Using Our BMI Calculator

Advantages Description
Quick & Easy Get your BMI instantly with a simple input—no login or personal data required.
Mobile Friendly Fully responsive design works seamlessly across smartphones, tablets, and desktops.
Accurate Results Based on the standard WHO BMI formula used by health professionals worldwide.
Personalized Feedback Shows your BMI category (e.g., Underweight, Normal, Overweight) with helpful tips.
No Cost Free to use anytime without sign-up or payment.

Understanding BMI: Frequently Wondered Topics

What is BMI?

BMI, or Body Mass Index, is a simple calculation used to determine whether a person is underweight, normal weight, overweight, or obese. It applies to adult men and women.

How does the BMI Calculator work?

This BMI calculator uses your weight and height to compute a number that indicates your health category. It's ideal for both men and women.

Is there a different BMI calculator for women or men?

The BMI formula is the same for all adults, but interpretation may vary slightly based on gender and fitness level. This tool works as a BMI calculator for women and a BMI calculator for men.

How to use this BMI calculator?

Enter your height in centimeters and weight in kilograms, then click “Calculate BMI.” You’ll see your BMI score and health classification instantly.

Is BMI a reliable indicator of health?

BMI is a good general health indicator, but it doesn’t account for muscle mass or body composition. Athletes and individuals with higher muscle mass may have a higher BMI but low body fat.

Frequently Asked Questions (FAQs)

A healthy BMI typically ranges between 18.5 and 24.9. Below 18.5 is underweight, 25 to 29.9 is overweight, and 30 or more is obese.

No, this BMI calculator is designed for adults. Children’s BMI is measured differently and based on age and gender percentiles.

The formula remains the same, but body fat distribution may differ. This tool works well as a BMI calculator male or BMI calculator female.

Checking your BMI once every few months is sufficient, unless you're actively monitoring weight changes or following a fitness plan.

Yes, individuals with more muscle may have a higher BMI without being overweight. BMI doesn't differentiate between fat and muscle mass.