Estimates your basal metabolic rate using the revised Harris-Benedict equation.
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Calculation basis and official references
Reviewed on:
This calculator is not a diagnosis, treatment plan, or prescription. Please consult a qualified clinician about your medical decisions.
Formula basis
Men: BMR (kcal/day) = 13.397 x weight(kg) + 4.799 x height(cm) - 5.677 x age(years) + 88.362. Women: BMR (kcal/day) = 9.247 x weight(kg) + 3.098 x height(cm) - 4.33 x age(years) + 447.593.
Calculation method
Estimates the energy required to maintain basic life functions at rest (BMR) from age, sex, height, and weight, using the revised Harris-Benedict equation (Roza & Shizgal, 1984).
Exclusions and checks required
The equation does not directly account for body composition (lean mass), so accuracy decreases for people with unusually high or low muscle mass.
It is a regression equation derived from a 1984 study population and is not a substitute for measured resting energy expenditure (indirect calorimetry).
Conditions affecting metabolism, such as thyroid disorders, can cause this estimate to diverge from an individual's actual basal metabolic rate.
Example input:：A 30-year-old man, 170 cm tall, weighing 60 kg
age
30
sex
Male
height
170
weight
60
The estimated BMR is about 1,537.7 kcal/day. This is a statistical estimate and may differ from an individually measured value.
Who is this calculator for? Basal Metabolic Rate (BMR)
Estimates your basal metabolic rate using the revised Harris-Benedict equation.
What values should I enter?
Applies to: Body & metabolism
How should I interpret this estimate?
Estimates the energy required to maintain basic life functions at rest (BMR) from age, sex, height, and weight, using the revised Harris-Benedict equation (Roza & Shizgal, 1984).
How to use
Enter your input values and press Calculate.
Review the result and compare it with expected context.
Men: BMR (kcal/day) = 13.397 x weight(kg) + 4.799 x height(cm) - 5.677 x age(years) + 88.362. Women: BMR (kcal/day) = 9.247 x weight(kg) + 3.098 x height(cm) - 4.33 x age(years) + 447.593.