Is the BMR calculator on Bodybuilding.com free to use?

Yes, the calculator is free to use and does not require a paid subscription or account creation to get your results.

Can I use this calculator if I am very muscular or very lean?

The Mifflin-St Jeor equation provides a general estimate; highly muscular or very lean individuals may find the result differs from their actual resting metabolism, so treat the number as a starting point rather than a precise measurement.

What activity level should I select after getting my BMR?

Choose the activity factor that best matches your typical daily movement and exercise routine; the calculator pairs this with a suggested total daily calorie range for weight loss or maintenance.

Does the calculator provide a plan for weight loss or muscle gain?

Yes, after calculating your BMR the tool offers practical next-step guidance for setting calorie targets and aligning them with your training goals.

Body Metrics & FitnessTool Review

BMR Calculator (Basal Metabolic Rate, Mifflin St Jeor Equation)

Provided byBodybuilding.combodybuilding.com

This free BMR calculator estimates resting calorie burn from age, sex, height, and weight. It is paired with practica...

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About this tool

What BMR Calculator (Basal Metabolic Rate, Mifflin St Jeor Equation) does

A BMR calculator that estimates the calories your body burns at complete rest using age, sex, height, and weight. The result provides a baseline number you can multiply by an activity factor to determine total daily energy needs. The Bodybuilding.com version is paired with practical next-step guidance for calorie targets and training goals, and it functions without requiring a paid subscription. While the interface includes typical site navigation and promotional elements, the calculator itself is straightforward and focused on delivering the metabolic rate figure and a suggested daily intake range.

Step by step

How to use the Bodybuilding.com BMR Calculator (Basal Metabolic Rate, Mifflin St Jeor Equation)

1
Enter your age in years
2
Select your sex (male or female)
3
Input your height in centimeters or inches
4
Enter your weight in kilograms or pounds
5
Click calculate to view your estimated BMR and suggested daily calorie range

Is it right for you

Best for

Individuals seeking a quick estimate of resting calorie burn to inform weight loss, maintenance, or muscle gain plans, especially those who want immediate guidance on next steps without signing up for a service.

Limitations

Results are estimates based on the Mifflin-St Jeor formula and do not account for muscle mass, fitness level, or individual metabolic variat
The site surrounding the calculator contains typical fitness retail promotions and navigation links
No option to adjust for pregnancy, illness, or highly active occupations beyond standard activity multipliers

Questions

BMR Calculator (Basal Metabolic Rate, Mifflin St Jeor Equation) FAQ

Is the BMR calculator on Bodybuilding.com free to use?: Yes, the calculator is free to use and does not require a paid subscription or account creation to get your results.
Can I use this calculator if I am very muscular or very lean?: The Mifflin-St Jeor equation provides a general estimate; highly muscular or very lean individuals may find the result differs from their actual resting metabolism, so treat the number as a starting point rather than a precise measurement.
What activity level should I select after getting my BMR?: Choose the activity factor that best matches your typical daily movement and exercise routine; the calculator pairs this with a suggested total daily calorie range for weight loss or maintenance.
Does the calculator provide a plan for weight loss or muscle gain?: Yes, after calculating your BMR the tool offers practical next-step guidance for setting calorie targets and aligning them with your training goals.

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