BMR Calculator

Estimate your Basal Metabolic Rate (BMR) using age, gender, height, and weight. BMR reflects your baseline daily energy needs at rest.

Calculate Your BMR

Enter your details to estimate daily calories your body uses at rest.

BMR input fields

Enter your age in years.

Use centimeters for height.

Use kilograms for weight.

Your result

Your BMR estimate will appear here after calculation.

Disclaimer: BMR results are estimates for general planning and do not replace medical advice or diagnosis.

Understanding BMR

What is BMR?

Basal Metabolic Rate (BMR) is the estimated number of calories your body needs each day to support essential functions at rest, such as breathing and circulation.

How is BMR estimated?

This calculator uses a standard equation based on age, gender, height, and weight to provide a practical baseline estimate.

How to use your BMR result

  • Use BMR as a starting point for calorie planning.
  • Apply an activity multiplier for maintenance calories.
  • Adjust your intake based on progress trends over time.
  • Pair BMR with BMI and body fat tools for better context.

BMR Calculator FAQ

What is the difference between BMR and TDEE?

BMR estimates calories at rest, while TDEE includes physical activity and daily movement.

Can BMR change over time?

Yes. BMR can shift with age, body weight, body composition, and lifestyle changes.

Is BMR enough to set calorie targets?

BMR is a baseline. Most plans use BMR plus activity level to estimate total daily needs.

How often should I recalculate BMR?

Recalculate every few months or after meaningful changes in body weight or routine.

Is this a medical diagnostic tool?

No. It is an educational estimation tool and not a replacement for professional medical evaluation.

Which inputs matter most for BMR?

Age, gender, height, and weight all influence the estimate and should be entered carefully.