Calculate Your Body Mass Index

Body mass index (BMI) is a measure of body fat based on height and weight that applies to adult men and women. View the BMI tables or use the tool below to compute yours.

  • Enter your weight and height using standard or metric measures.
  • Select “Compute BMI” and your BMI will appear below.

BMI Calculator for calculating body mass index to see how many calories you need to maintain your body weight.  Can be used to know how many calories you need to gain or lose weight.

BMI Calculator


Basal Metabolic Rate

Total Daily Energy Expenditure












Waist to Height






Workout Calories


Rest Calories


Weeks To Goal


Final Weight


Weight Class

Before using the data obtained using this calculator, please consult with doctor.

How to Use a BMI Calculator: What You Should Know

If you have ever been curious about your body mass index, or BMI, then chances are you have come across a BMI calculator on the internet. It is straightforward to use and can save time when trying to figure out what your BMI is. In this article, we will discuss how to use a BMI calculator and some of the benefits of using one.

What is a BMI Calculator?

A BMI calculator is a tool you can use to measure your body mass index. It will tell you whether or not you are within the healthy weight range. If your BMI falls in this range, then chances are you’re at a healthy weight. Outside of this range, there may be an issue with food and exercise habits, and they need to change. This can significantly help you if you are a meal planner and want to make healthy meals to improve your BMI.

The purpose of using a BMI Calculator is threefold:

  • To quickly calculate your BMI number
  • To estimate if your measurements fall into the normal (healthy) category
  • To compare different people’s BMIs for relative comparison between populations or groups on average weights

You can calculate your BMI either online or by using an in-person consultation with a professional such as a doctor, nurse practitioner, or dietician. There are many different versions of the calculator, and they all use slightly different formulas, which ultimately lead to somewhat different results.

For example, some calculators take into account information about age and sex while others do not. Some also have additional options for metric measurements, whereas other calculators only provide imperial measurements (e.g., pound vs. kilogram).

How to Use a BMI Calculator

Using a BMI calculator is relatively easy. Online calculators only ask you for two things: your height and weight. For the calculator to be accurate, you need to have a recent measure of both, so it’s best to input this information on an ongoing basis.

Your BMI is calculated by dividing your weight by the square of your height. The resulting number will fall between 18.50 and 25.00, with “normal” being in the middle at around 20. If that number falls outside those bounds, then there may be cause for concern about health risks from obesity or underweight conditions such as chronic illness or malnutrition.

Different Sections of a BMI Calculator

While BMI calculators usually only use your height and weight to perform their calculations, there are other acronyms that you should be aware of when you look into using a meal planner to improve your diet.

  • BMR – This stands for basal metabolic rate and estimates the number of calories your body will need to function at rest.
  • TDEE – Your total daily energy expenditure is the number of calories you’ll use in a day, including exercise.
  • TEF – Your thermal effect of food estimates how many calories your body burns by digesting and absorbing nutrients from food.
  • LBM – Lean body mass estimates how much muscle, bone, and other tissue you carry on your frame.
  • FBM – Fat body mass is an estimate of the amount of fat you have on your frame.
  • MFM – Maternal fetal medicine usually plays a role in obesity that occurs during pregnancy.
  • MRDC – This is the minimum recommended daily calories set at about 1200 for women and 1800 for men.

Benefits of Using a BMI Calculator

A BMI calculator aims to help you determine your body fat percentage and thus how much weight you should lose or gain. This tool can be helpful when considering whether it’s time for a lifestyle change, but as with any other calculation involving physical measurements, there are limitations.

A common misconception about the BMI scale is that people who fall in the overweight category will always have high body fat levels. A person between 30-39% could also fall into this range if they had large muscle mass rather than higher percentages of adipose tissue (body fat).


The BMI calculator is a helpful tool for determining body fat percentage, but it’s essential to keep in mind that the calculations can only provide estimates.

In addition to using this calculation to indicate whether or not you need additional weight loss management, be sure to talk with your doctor about what other steps might help you reach your goals.

BMI Categories:
Underweight = <18.5
Normal weight = 18.5–24.9
Overweight = 25–29.9
Obesity = BMI of 30 or greater


What Next? Take Action Towards Better Health:

Maintain a Healthy Weight

Increase Physical Activity

  • Moving more can lower your risk factors for heart disease.

Eat a Heart-Healthy Diet

  • Eating a healthy diet is the key to heart disease prevention.