Basal Metabolic Rate (BMR) Estimate

How this calculator works

Mifflin–St Jeor combines weight, height, age, and a sex-specific equation constant.

Change one assumption at a time to see which inputs have the greatest effect on the estimate.

Worked example

The result estimates resting needs before activity.

Limitations

Educational estimate only. This calculator does not diagnose any condition, provide medical advice, prescribe treatment, or replace a doctor or qualified healthcare professional. Individual metabolism varies and clinical nutrition needs require professional assessment.

Review this educational estimate against current quotes, official information, and your own budget before making a financial decision.