BMI Calculator

BMI Calculator


Use Other Calculator: Pregnancy Weight Gain Calculator.

Q. What is BMI?

What is BMI? BMI, or body mass index, is a key indicator used to determine the percentage of body fat in an individual. Let's break it down. Firstly, we need to understand the prerequisites for calculating BMI, which are height and weight. The BMI formula involves dividing weight by height squared, typically using height measured in centimeters. However, since height is commonly measured in feet or centimeters, we must convert it to meters for the formula to work. This conversion is simple: 100 centimeters equals 1 meter.

BMI Calculator
BMI Calculator

Let's illustrate with an example. Suppose someone weighs 77 kilograms and has a height of 165 centimeters. To convert centimeters to meters, we divide 165 by 100, resulting in 1.65 meters. Now, applying the BMI formula, we square the height (1.65 meters multiplied by 1.65 meters) to get 2.7225 square meters. Then, we divide the weight (77 kilograms) by the square of the height (2.7225 square meters). The result is approximately 28.28. This calculated value represents the BMI.

BMI Calculator Formula

bmi calculator formula
bmi calculator formula

The BMI (Body Mass Index) Calculator Formula is a simple calculation that uses a person's weight and height to estimate their body fat. It is estimated by dividing a person's weight in kilograms by their height in meters squared. This formula helps individuals understand their overall health in relation to their weight and height.

Category Wise BMI Calculator

body mass index chart
body mass index chart

Picture the BMI (Body Mass Index) Calculator, certified by the World Health Organization (WHO), as your trustworthy health navigator, guiding you through different nutritional statuses. If your BMI dips below 18.5, you're in the "Underweight" league. Scores ranging from 18.5 to 24.9 land you squarely in the "Normal Weight" camp - a great place to be! But watch out if your BMI falls between 25.0 and 29.9; you're stepping into "Pre-Obesity" territory. 

Scores from 30.0 to 34.9 place you in "Obesity Class |", while 35.0 to 39.9 earn you a spot in "Obesity Class ||". And if your BMI soars above 40, welcome to the prestigious "Obesity Class |||". With WHO certification, this BMI Calculator is your trusted companion on your journey to better health!

The Role of BMI for Pregnant Women

When it comes to pregnancy, every expecting mother naturally has questions swirling in her mind, and one of the common queries is, "Can I still use the BMI calculator while pregnant?" The resounding answer is YES! Your BMI (Body Mass Index) is still super important during pregnancy. While you're growing a little one inside, it's crucial to keep an eye on your health, and BMI helps with that. It is not about fitting into a specific size; it is about keeping you and your baby healthy throughout this incredible adventure.

Checking your BMI when pregnant provides useful information about your health. It allows your healthcare team to give you specific guidance for a smooth pregnancy. Whether it's understanding how much weight to gain or looking out for any risks like obesity or being underweight, your BMI is like a friendly guide, helping you make smart choices for you and your baby's well-being.

So, embrace your body's changes and let your BMI be your guide during this beautiful time. Remember that every bump and curve tells a wonderful story. Trust your body's wisdom, communicate with your healthcare experts, and allow your BMI calculator be a soothing companion along the way. 

Pros and cons BMI Calculator:


  • Quick Health Snapshot:Our BMI calculator provides a quick snapshot of your health based on your height and weight. It's a simple way to kickstart your wellness journey.
  • Awareness Tool: Using our BMI calculator can raise awareness about your weight and potential health risks. It's the first step towards a healthier lifestyle.
  • Accessible: BMI calculators are readily available online and can be accessed anytime, anywhere, making them convenient for anyone concerned about their health.


  • Simplicity: BMI calculations solely based on height and weight might oversimplify health assessments, disregarding factors like muscle mass or distribution of fat.
  • Individual Variation: Keep in mind that BMI doesn't account for individual variations such as age, gender, or ethnicity. Your results may not fully represent your unique health profile.
  • Emotional Impact: For some, BMI results can trigger negative emotions or anxiety, especially if they don't align with societal norms or personal expectations.

Accuracy of BMI Calculator

Our online body mass index (BMI) calculator provides you with 100% accurate and correct results when your body height and weight are entered accurately. The accuracy of the BMI calculation relies on the correct input of these parameters. Our BMI calculator adheres to the standard formula for BMI calculation, ensuring that the results provided are accurate and reliable.

Frequently Asked Questions

What does Body Mass Index mean?

The Body Mass Index (BMI) is a health overview that indicates whether your weight matches your height. It's a simple mathematical formula that uses your weight and height to determine how much body fat you have. It helps you determine whether you are underweight, normal weight, overweight, or obese.

Is the Body Mass Index (BMI) a good indicator of health?

The BMI calculator is a useful tool, but it's not perfect. Although it provides an overall picture of your health based on weight and height, it ignores elements such as muscle mass and where your body stores fat. Therefore, while it's a fantastic starting point, it doesn't provide a complete picture of your health.

Can I use the Body Mass Index calculator with age and gender?

Absolutely! There are BMI calculators that take into account age and gender, which can provide more accurate results. These updated calculators recognize that different age groups and genders may have different healthy BMI ranges. Using such a calculator that considers age and gender can give you a better idea of your health status. However, it's important to note that our BMI calculator does not take gender into account. Nevertheless, you can input your age, height, and weight to get an accurate estimate of your BMI and overall health status.