BMR Calculator
Estimate basal metabolic rate and daily calorie needs with Metric, US, or UK units.
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View allAbout this BMR Calculator
This free BMR calculator estimates basal metabolic rate with the Mifflin–St Jeor equation, then projects daily maintenance calories (TDEE) from your activity level. Use Men or Women profiles with Metric, US, or UK units.
How to calculate BMR
- 1
Choose profile and units
Select Men or Women and Metric, US, or UK units.
- 2
Enter age, height, and weight
Fill in your details so the calculator can estimate resting calorie burn.
- 3
Pick activity and review targets
Choose an activity level to see TDEE plus mild deficit and surplus calorie guidance.
Why use this BMR calculator
Mifflin–St Jeor formula
A widely used clinical estimate for adult resting calorie needs.
Activity-aware TDEE
Map BMR to daily maintenance calories across five activity levels.
Metric, US & UK units
Enter measurements the way you already track them.
Quick calorie guidance
See mild deficit and surplus targets to support lose/gain goals.
Frequently asked questions - FAQs
Quick answers about BMR Calculator.
No. BMR is resting burn. Multiply by activity (TDEE) for a maintenance estimate, then adjust for loss or gain.
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