BMI Calculator

Calculate your Body Mass Index (BMI) to find out if you are underweight, normal, overweight, or obese.

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Enter your measurements and click Calculate.

Formula: BMI = weight(kg) / height(m)². For imperial: BMI = 703 × weight(lbs) / height(in)²

Body weight is one thing that is essential for good health. Knowing where your body stands is a great place to start, whether you are looking to lose weight, gain weight, get fit, or just keep an eye on your health.

The Body Mass Index (BMI) is one of the most popular ways to measure weight and height. BMI Calculator will quickly calculate your BMI (Body Mass Index) based on your height and weight. You can see if your BMI is underweight, normal, overweight, or obese in seconds.

BMI is not a direct indicator of body fat, but rather a screening tool to help people determine their status as underweight, normal weight, or overweight, and make decisions about potentially needing more health screenings.

What Is a BMI Calculator?

The function of a BMI Calculator is to estimate your Body Mass Index (BMI) by calculating it with your height and weight. BMI is a number that measures how well an individual's weight compares to his or her height, to find out if an individual's body weight is within a healthy range. BMI is easy, fast, and widely known, making it a common screening tool for adults in healthcare. BMI cannot directly measure body fat, but it is a good indicator of the risk of health problems caused by weight.

● The BMI Calculator is available for download.

● Enter your height and weight in the units shown, then calculate the BMI.

● All you have to do is follow these steps:

● Enter your height.

● Type in your actual weight.

● If you have a choice, choose your preferred measurement units.

● Add the number 2 and press Calculate. Press the Calculate button.

● View your BMI value and weight category.

BMI can be calculated when you change weight, or as you keep track of your health and fitness.

Body composition scale device

Why Use a BMI Calculator?

Knowing your BMI can assist you in making healthier choices for health and lifestyle. Learn about your weight category. Understand your weight category. See on the spot if you are underweight, healthy weight, overweight, or obese.

Monitor Your Health Progress

Keep a record of your BMI as you improve your diet, exercise, or weight management plan.

Support Fitness Goals

BMI is a helpful indicator for weight loss, weight gain, and maintaining weight.

Promote healthy lifestyle options.

Being aware of your BMI can encourage you to make healthier food choices and to be more active.

Quick and Convenient

The calculator calculates BMI automatically in seconds as opposed to calculation by hand.

BMI Categories

Once you obtain your BMI, you will place it in one of the following categories.

BMI Range Weight Category Below 18.5

Underweight

18.5 – 24.9

Normal Weight

25.0 – 29.9

Overweight

30.0 and Above Obese

These categories are an overall guideline for adults. Additional evaluation and measurements may be necessary for individual health assessments.

What factors can influence the BMI?

BMI is determined from a person's height and weight, but other factors do affect overall health.

Height

Body Mass Index is one of the two measurements used to determine height.

Weight

Only alterations in body weight will impact BMI.

Age

BMI indices are frequently used in adults, but in children and adolescents, BMI interpretation takes into account age and growth patterns.

Muscle Mass

A higher BMI doesn't necessarily indicate a high body fat percentage, especially for individuals with a higher muscle mass. Athletes, for example.

Body Composition

BMI does not differentiate between muscle, fat, bone, and water. People who have the same BMI can have very different body composition. There are several advantages to using a BMI calculator. A BMI Calculator can offer some benefits.

BMI category chart illustration

Information Required for Calculation

InputDescription
HeightYour current height is centimeters, meters, feet, or inches.
WeightYour current body weight in kilograms or pounds.
Unit SelectionMetric or Imperial units, depending on your preference.
BMI ResultYour calculated Body Mass Index value.

Weight Category: Underweight, Normal Weight, Overweight, or Obese.

BMI Calculator Benefits

Calculate BMI instantly.

● Know your weight classification.

● Monitor weight management progress.

● Help to plan for a healthy lifestyle.

● Promote healthy eating and physical activity.

● Follow patterns of change.

● Simple to operate and use for regular health tracking.

● Useful for general health education.

Guidelines for keeping your BMI healthy

A healthy BMI requires lifestyle choices to be made that are sustainable.

Follow a well-balanced, healthful diet. Engage in physical activity almost every day of the week. Get regular exercise, cardiovascular and strength training. Make sure you get sufficient sleep each night. Drink plenty of fluids during the day. Keep track of your weight regularly. Take the BMI Calculator for a spin occasionally to monitor progress. Keep in mind that other factors contribute to overall health besides BMI.

BMI scale ranges chart

Frequently Asked Questions

Can you use the BMI Calculator for free?

Yes. Our BMI Calculator will never cost you anything and can be used anytime you wish to calculate your BMI.

Is BMI accurate?

BMI is a good indicator of weight status for most adults. But it does not directly reflect body fat or take into account muscle mass, body composition, or individual health issues.

Is it possible to be an athlete and have a high BMI?

Yes. Someone with a high BMI (often an athlete or someone with a large amount of muscle mass) may not have a healthy body fat percentage.

Will I be able to use the BMI Calculator regularly?

Absolutely. It is used by many as a way to track their weight loss and progress towards their fitness or health objectives.

Does BMI make a diagnosis of disease?

No. BMI is not a medical diagnosis but a screening tool. If you are worried about your weight or health, seek advice from a knowledgeable health care provider.

Conclusion

BMI is a screening measure based on height and weight, not a diagnosis or a direct measure of body fat. Interpret it with other health information and a clinician's guidance.

BMI formula written in notebook

Worked Examples

Example 1: Normal weight adult.

Inputs: Height 5'8" (173 cm), weight 150 lbs (68 kg).

Calculation and result: BMI = 22.8 — in the normal weight range (18.5-24.9 per WHO).

Example 2: Overweight category.

Inputs: Height 5'5" (165 cm), weight 175 lbs (79 kg).

Calculation and result: BMI = 29.1 — in the overweight range (25-29.9). Borderline obesity; lifestyle changes recommended.

Example 3: BMI for a tall athletic build.

Inputs: Height 6'2" (188 cm), weight 220 lbs (100 kg).

Calculation and result: BMI = 28.2 — flagged as overweight, but for a muscular build this is misleading. Body fat percentage is more meaningful here.

Sources for BMI Calculator

Official reference links for this calculator page: