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🔥 BMR Calculator

Estimate adult basal metabolic rate (BMR) from age, formula sex, height, and weight using the Mifflin-St Jeor formula. For general information only; not medical or nutrition advice.

This is an adult BMR formula estimator for general information only. It estimates basal metabolic rate, not TDEE or your total calories burned in a full day.

Results on this page are not medical advice, a diagnosis, or individualized nutrition guidance, and they are not intended for minors, pregnancy, lactation, or people who need clinician-led care.

Privacy note: Calculations run locally by default. Your age, height, weight, and formula inputs are not uploaded.

Age only accepts whole numbers from 18 to 120; height and weight only accept ASCII digits with an optional decimal point.

This tool uses a single Mifflin-St Jeor formula and does not provide activity levels, TDEE, or calorie recommendations.

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Free BMR calculator for estimating adult basal metabolic rate from age, formula sex, height, and weight using the Mifflin-St Jeor formula. For general information only; not medical advice, a diagnosis, or individualized nutrition guidance.