Weight (kg) Enter your body weight in kilograms (e.g., 65.5)

Height (cm) Enter your height in centimeters (e.g., 165)

Quick Examples:

Average Indian Adult Overweight Case

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This calculator provides estimates that may vary from clinical measurements. For accurate body composition analysis, consult a healthcare professional.

Use this calculator by entering your weight in kilograms and height in centimeters. Click the Calculate button to see your BMI value and category. You can also try the quick examples to see how the tool works.

What Is Body Mass Index

Body Mass Index, or BMI, is a number that comes from a math formula using your weight and height. It gives a quick idea of whether a person's weight may be in a healthy range for their height. Doctors and health workers around the world use BMI as a first step to check if someone might be underweight, at a normal weight, overweight, or obese. However, BMI does not measure body fat directly.

How Body Mass Index Is Calculated

Formula

To find your BMI, the formula first takes your height in meters and multiplies it by itself. This gives your height squared. Then it divides your weight in kilograms by that squared height number. For example, if you are 165 cm tall, that is 1.65 meters. Your height squared is 1.65 times 1.65, which equals about 2.72. If you weigh 65 kg, you divide 65 by 2.72 to get a BMI of about 23.9.

Why Body Mass Index Matters

Knowing your BMI may help you understand if your weight is in a range that is commonly linked with good health. It is a simple starting point to think about your overall health and whether you may want to talk to a doctor about your weight.

Why Knowing Your Weight Status Is Important for General Health

Missing an unhealthy weight range may mean that health issues linked to extra weight or too little weight go unnoticed for a longer time. People whose BMI falls outside the normal range may have a higher statistical association with conditions like heart disease, diabetes, or weak bones. Checking your BMI from time to time may help you notice changes early and consider talking to a healthcare provider before problems grow.

For Weight Management Goals

If your goal is to reach or stay in a healthy weight range, BMI gives you a simple number to track over time. As you make changes to your diet or activity level, watching your BMI move toward the normal range may help you see if your efforts are heading in a helpful direction. It works best when used along with other health checks.

For Athletes and Highly Active People

BMI may not work as well for people who have a lot of muscle. Muscle weighs more than fat, so a very fit person may have a high BMI even if their body fat is low. Athletes may want to use other methods like body fat measurement to get a better picture of their health and fitness level.

Body Mass Index vs Body Fat Percentage

BMI uses only your weight and height, while body fat percentage tells you how much of your weight is fat versus muscle, bone, and water. Two people with the same BMI can have very different body fat levels. BMI is a quick screening tool, but body fat percentage may give a clearer view of your true body composition. A doctor can help you decide which measure is more useful for you.