BMR Calculator
Estimate BMR, TDEE, maintenance, cutting, and bulking calories from age, height, weight, sex, and activity.
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Estimate BMR and daily maintenance calories
BMR Calculator estimates basal metabolic rate, TDEE, and maintenance, cutting, or bulking calorie references from age, sex, height, weight, and activity level. It is useful when starting a diet plan, workout goal, or weight-tracking routine.
Useful For
- Estimate BMR and maintenance calories
- Reference cutting or bulking calorie targets
- Compare TDEE by activity level
Good To Know
BMR formulas are estimates and can vary with muscle mass, health status, hormones, and lifestyle. Consult a professional for medical or nutrition decisions.
Result Check
Try an example first to understand the input flow. Before submitting, sharing, or copying important output, compare the result with the original source once more.
How It Works
Inputs are calculated or converted in the browser whenever possible. Compare important results with the original source before using them. Reviewed on Jul 1, 2026.
BMR calculation checks
Inputs
- Enter current age, sex, height, and weight
- Activity level has a large impact on the estimate
Formula
- BMR estimates resting metabolism, while TDEE includes activity
- Mifflin-St Jeor is still an estimate with individual variation
Use
- Adjust cutting or bulking calories based on 2-4 weeks of weight trends
- For medical conditions or medication, seek professional advice
BMR estimates resting energy needs, while TDEE estimates daily energy expenditure after applying activity level.
It uses common sex, age, height, and weight based estimation formulas to produce reference values.
Actual metabolism can vary by body composition, medical conditions, medication, and training level. Consult a professional for medical decisions.