Harris-Benedict BMR Calculator
Calculate your daily Basal Metabolic Rate from age, height, and weight
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This BMR calculator uses the Revised Harris-Benedict Equation to estimate your daily Basal Metabolic Rate based on your gender, age, height, and weight. It's a handy starting point for anyone planning a diet or calorie-controlled meal plan, and since every calculation happens right in your browser, none of your personal body data is ever sent to a server.
How to use
- Select your gender (male or female).
- Enter your age, height (cm), and weight (kg).
- Your estimated BMR in kcal/day appears instantly at the top.
FAQ
- What exactly is BMR?
- BMR is the minimum number of calories your body needs to maintain basic life functions—breathing, circulation, and organ function—while completely at rest.
- Should I eat exactly my BMR in calories per day?
- No. BMR doesn't account for daily activity. Most people multiply their BMR by an activity factor to get their total daily calorie needs.
- Why does the formula differ for men and women?
- The Harris-Benedict equation uses different coefficients for men and women to reflect average differences in body composition, such as muscle mass and body fat percentage.