Basal Metabolic Rate Calculator

Calculate your Basal Metabolic Rate (BMR) and daily calorie needs based on your personal metrics and activity level.

Request Feature / Support

27,692+

Total Calculations Run

< 15ms

Browser Execution Speed

100%

Client-Side Privacy

4.9 / 5.0

User Satisfaction

AI Web Tool Generator

Build Your Own Custom Web Calculator in Seconds

Type what tool or calculator you need below. Our AI will build it instantly for your site.

About This Tool

This BMR (Basal Metabolic Rate) calculator uses the scientifically validated Mifflin-St Jeor equation to determine how many calories your body needs at rest. By entering your age, gender, weight, height, and activity level, you'll get your BMR and TDEE (Total Daily Energy Expenditure) - the calories you burn daily. The tool also provides calorie recommendations for weight loss, maintenance, and weight gain goals, helping you make informed nutrition decisions.

Save your calculation history with a free account

How to Use

Select your gender (male/female)
Enter your age in years
Enter your weight in kilograms or pounds (use the toggle)
Enter your height in centimeters or feet/inches (use the toggle)
Select your typical activity level from sedentary to very active
Click 'Calculate BMR' to see your results
View your BMR, TDEE, and calorie recommendations for different goals

Frequently Asked Questions

Find Quick Answers

What is BMR?

BMR (Basal Metabolic Rate) is the number of calories your body needs to perform basic life-sustaining functions like breathing, circulation, and cell production while at complete rest.

Which equation does this calculator use?

This calculator uses the Mifflin-St Jeor equation, which is considered the most accurate for calculating BMR in healthy adults according to the American Dietetic Association.

What is TDEE?

TDEE (Total Daily Energy Expenditure) is your BMR multiplied by an activity factor. It represents the total calories you burn in a day including physical activity and digestion.

How accurate is this calculator?

While the Mifflin-St Jeor equation is scientifically validated, individual variations in metabolism, body composition, and health conditions can affect accuracy. Use results as a starting point and consult a healthcare professional for personalized advice.

Can I use this for weight loss planning?

Yes, the calculator provides calorie recommendations for weight loss (typically 500 calories below TDEE for ~1 lb/week loss), maintenance, and weight gain. Always combine calorie adjustments with balanced nutrition and exercise.

Need to run multiple calculations?

Create a free account today to unlock unlimited daily runs, access advanced parameters, save your history, and request custom features.

Related Tools

Other useful calculators and utilities you might like

Spotify to MP3 Converter

Convert Spotify tracks and playlists to MP3 format instantly with our free online converter.

Road Distance Calculator

Calculate the driving distance and travel time between two addresses with our free online road dista...

Age Calculator

Calculate your exact age in years, months, and days from any birth date to any target date.

Currency Converter

Convert currencies instantly with real-time exchange rates and historical data support.

Your Feedback Matters

Help Us to Improve