BFM - Body Fat Mass Calculator Explained

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Last updated: January 10, 2024

BFM – Body Fat Mass Calculator

What is the BFM calculator?

The Body Fat Mass (BFM) calculator is a simple tool for estimating the percentage of total body fat based on gender, age, height, and weight.

What is body fat?

Body fat, sometimes called Adipose tissue, is a complex organ that performs several vital bodily tasks. One of its leading roles is its ability to store and release energy in the form of fat and release it when the body needs it.[1]

Fat tissues in the human body come in three different types. The most prevalent kind is known as white fat. This substance consists of large white blood cells under the skin and surrounding organs. White fat is necessary for optimal health, but too much can be harmful. Conversely, brown fat is active and burns calories while producing heat. Last but not least, visceral fat is stored around internal organs and can cause health issues if it is in excess.

We strive to make our calculator apps as accurate as possible, but they cannot replace a professional doctor. Our website provides information for informational purposes, and it's not medical advice. Please consult your healthcare provider before making any decisions based on the results provided by our tool.

User Guide

This guide provides step-by-step instructions for using our calculator.

BFM – Body Fat Mass Calculator

How do you use a body fat calculator?

To calculate an estimated percentage and mass of your body fat, using our calculator, use the following steps:

  1. Check your preferred unit system.
  2. Select your gender.
  3. Enter your age.
  4. Enter your height.
  5. Enter your weight.

Body fat calculator - required information

Check and enter all required information.

When you fill in all the required information, our BFM calculator will calculate and show your estimated body fat classification, percentage, and mass.

Body fat calculator - Results

Check the table below the result section to see your body fat classification.

Body fat calculator - Classification

Calculation Features

Our calculator has some essential features to help you fill in your information and get the result as quickly as possible.

Type, Click, or Swipe

We developed the calculator to accept all interaction methods to speed up your information-filling process. In most input fields, you don't need to use the keyboard. You can use the mouse or finger to adjust the field value by swiping within a predefined range.

Assisted information-filling

More ways to adjust the value

Some calculators also offer a range of preset values, which you can quickly enter by clicking the associated button.

Preset Values

You can fill the field with preset values.

Metric or Imperial Unit

Each calculator has a unit switcher button right under the form. The calculator switches between the metric and imperial systems when you click or tap on it. All input values are converted to an appropriate target unit (e.g., cm to feet, in).

Health Calculator - Unit System Switcher

Convert values between metric and imperial systems.

Reload the form

Click the refresh icon or button under the form to calculate new information.

Health Calculator - Reload the form


Our calculator provides personalization features, allowing users to customize the user interface to match their preferences.

Change dark mode

By default, our calculator dark mode follows your system's preference. However, you can change it by opening the Settings menu and turning on/off the dark mode switch.

Health Calculator - Change Dark Mode

Open the Settings menu and toggle the dark mode switch.

Change theme color

Our calculator comes with several theme colors to match your preferences. You can change them by opening the Settings > Theme menu and selecting your favorite color.

Health Calculator - Change Theme Color

Open the Settings menu, open the Theme menu, and select a color.

BFM – Body Fat Mass Calculator

BFM – Body Fat Mass Calculator App

About this app

Our Body Fat Mass (BFM) calculator is a simple tool that calculates your total body fat out of your total body mass. Just enter your age, weight, and height to get your result.

App availability

You can use the calculator for free as a PWA web app online or install it locally on any modern operating system, including Android, iOS, Windows 11/10, and macOS.

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1 Source

  1. ⬆️ Yu C. What You Need to Know About Body Fat. WebMD. Published November 2, 2022. Accessed March 21, 2024.