Basal Metabolic Rate Calculator Explained

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Last updated: December 23, 2023

BMR – Basal Metabolic Rate Calculator

What is the BMR calculator?

Babal metabolic rate or BMR calculator is a tool that allows you to estimate your BMR based on your gender, age, weight, height, and activity level.

What is basal metabolic rate?

Basal Metabolic Rate (BMR) is the lowest number of calories your body needs to carry out its basic processes. The quantity of calories your body burns while at rest or spending the entire day in bed is your resting metabolic rate (RMR) or resting energy expenditure (REE).[1]

Energy is needed to maintain human life for vital processes such as breathing, circulation, cellular synthesis, nutrition processing, protein synthesis, and ion transport. Heartbeat, breathing, regulating body temperature, and circulation depend on these processes.

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.

BMR – Basal Metabolic Rate Calculator

How do you use a basal metabolic rate calculator?

To calculate an estimated minimum calories needed for your body, aka. Basal Metabolic Rate (BMR) using our calculator, use the following steps:

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

BMR Calculator - Input Fields

Check and enter all required information.

When you fill in all the required information, our BMR calculator will calculate and show your estimated basal metabolic rate results.

BMR Calculator - Result

The result above shows the minimum energy your body needs when resting. To estimate the number of calories based on your daily activity levels, check the table below the result section.

BMR Calculator - Activity levels

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.

BMR – Basal Metabolic Rate Calculator

BMR – Basal Metabolic Rate Calculator App

About this app

Our BMR calculator is an easy and accurate tool to help you find your basal metabolic rate (BMR). All you have to do is enter your age, weight, and height, and we'll calculate the calories you burn daily at rest.

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. ⬆️ Pavlidou E, Petridis D, Tolia M, et al. Estimating the agreement between the metabolic rate calculated from prediction equations and from a portable indirect calorimetry device: an effort to develop a new equation for predicting resting metabolic rate. Nutrition & Metabolism. 2018;15(1).