# BMR Calculator

Calculate Basal Metabolic Rate (BMR) - calories burned at complete rest

> Canonical page: https://elysiatools.com/en/tools/bmr-calculator

- **Category:** Health

- **Keywords:** bmr, basal metabolic rate, calculator, metabolism, resting metabolism, calories, health

## Overview

The BMR Calculator helps you determine your Basal Metabolic Rate, which is the number of calories your body burns at complete rest to maintain vital functions like breathing and circulation.

## Inputs

- **Weight (kg)** (number): Enter your weight
- **Height (cm)** (number): Enter your height
- **Age** (number): Enter your age
- **Gender** (select)
- **Formula** (select)

## When to use

- When you are planning a weight loss or muscle gain program and need to establish a caloric baseline.
- When you want to understand how many calories your body requires daily just to function while sedentary.
- When you are adjusting your nutritional intake to better align with your current metabolic needs.

## How it works

- Enter your current weight in kilograms and height in centimeters.
- Input your age and select your gender to ensure the calculation accounts for physiological differences.
- Choose your preferred scientific formula, such as Mifflin-St Jeor or Harris-Benedict, to generate the result.
- Click calculate to receive your estimated daily caloric expenditure at rest.

## Use cases

- Establishing a starting point for a personalized calorie-controlled diet plan.
- Monitoring metabolic changes as part of a long-term fitness or health transformation journey.
- Educating clients or patients on the baseline energy requirements of the human body.

## Frequently asked questions

### What is BMR?

BMR stands for Basal Metabolic Rate, representing the minimum amount of energy your body needs to perform basic life-sustaining functions.

### Which formula is the most accurate?

The Mifflin-St Jeor equation is widely considered the most accurate and reliable formula for the general population.

### Does BMR include exercise?

No, BMR only accounts for calories burned at rest. You must add your activity level to determine your Total Daily Energy Expenditure (TDEE).

### Why does gender affect the result?

Biological differences in muscle mass and body composition between genders influence how efficiently the body burns calories at rest.

### How often should I recalculate my BMR?

It is recommended to recalculate your BMR whenever you experience significant changes in your weight, age, or body composition.

## Related tools

- [Calorie Burned Calculator](https://elysiatools.com/en/tools/calorie-burned-calculator): Calculate calories burned during various activities
- [TDEE Calculator](https://elysiatools.com/en/tools/tdee-calculator): Calculate Total Daily Energy Expenditure (TDEE) - total calories burned per day
- [BMI Calculator](https://elysiatools.com/en/tools/bmi-calculator): Calculate Body Mass Index (BMI) and get health category recommendations
- [BMI Calculator for Children](https://elysiatools.com/en/tools/bmi-calculator-kids): Calculate BMI for children and teens (ages 2-20) with age and gender-specific percentiles
- [Body Fat Calculator (US Navy)](https://elysiatools.com/en/tools/body-fat-calculator-us-navy): Calculate body fat percentage using the US Navy method
- [Daily Calorie Needs Calculator](https://elysiatools.com/en/tools/daily-calorie-needs): Calculate daily calorie needs based on activity level and goals
- [Drug Half-Life Concentration Calculator](https://elysiatools.com/en/tools/drug-half-life-dose): Estimate plasma drug concentration at a chosen time after an IV bolus using a one-compartment model with first-order elimination: C(t) = (Dose / Vd) · e^(-k·t), where k = ln2 / t½. Includes initial concentration C0, elimination rate constant k, percent remaining, and number of half-lives elapsed. Valid only for linear pharmacokinetics — NOT for Michaelis-Menten drugs (phenytoin, high-dose ethanol) or multi-compartment distribution. Reference: theophylline Vd ≈ 0.45 L/kg, t½ ≈ 8 h. Not medical advice.
- [Ideal Weight Calculator](https://elysiatools.com/en/tools/ideal-weight-calculator): Calculate ideal body weight based on height, gender, and formula

## Samples

- [Android Image Processing Java Samples](https://elysiatools.com/en/samples/android-image-processing-java): Android Java image processing examples including reading/saving images, scaling, and format conversion
- [Android Image Processing Kotlin Samples](https://elysiatools.com/en/samples/android-image-processing-kotlin): Android Kotlin image processing examples including reading/saving images, scaling, and format conversion
- [Web Image Processing Python Samples](https://elysiatools.com/en/samples/web-image-processing-python): Web Python image processing examples using PIL/Pillow including reading, saving, resizing, and format conversion
- [Web Image Processing Rust Samples](https://elysiatools.com/en/samples/web-image-processing-rust): Web Rust image processing examples including image read/save, scaling, and format conversion

## Related content

- [Strength Training and Muscle Gain Estimation Workflow](https://elysiatools.com/en/hubs/strength-training-muscle-gain-workflows): Estimate barbell loading, training strength, calories, protein, macros, and body-composition markers for educational muscle-gain planning.