Estimate adult BMR
Use formula sex, age, height, and weight as a reference for resting energy expenditure.
BMR and Maintenance Calorie Calculator
BMR and Maintenance Calorie Calculator
Calculate adult basal metabolic rate and estimated maintenance calories with Mifflin-St Jeor and explicit activity factors.
Key features
- Calculates adult BMR using the Mifflin-St Jeor equation.
- Applies explicit activity factors from sedentary through extra active.
- Stops at BMR and estimated maintenance calories without deficit or surplus prescriptions.
How to use
- Choose units, formula sex, and an adult age.
- Enter height, weight, and activity level.
- Review BMR, maintenance estimate, assumptions, and limitations.
Examples
Compare activity levels
Change the activity factor to see how the maintenance-calorie estimate varies.
Privacy
Inputs and calculations stay in your browser and are not sent or stored.
Requirements
An estimate for adults aged 18–100. Pregnancy, medical conditions, athletic training, and individual metabolism need professional guidance.
Common questions
- How are maintenance calories calculated?
- The selected activity factor is multiplied by BMR from the Mifflin-St Jeor equation. It is not a measurement of actual intake or individual response.
- Does it prescribe calories for weight loss?
- No. It shows BMR and estimated maintenance calories only, without a deficit or surplus recommendation.
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