This calculator helps determine your Basal Metabolic Rate (BMR) using the Harris-Benedict Equation. It's designed for health and fitness enthusiasts who want to optimize their nutrition and energy expenditure.
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Data Source and Methodology
The calculations are based on the Harris-Benedict Equation, a widely-used formula in nutritional science. All calculations are strictly based on the formulas and data from this source: Wikipedia - Harris-Benedict Equation.
The Formula Explained
For men: BMR = 88.362 + (13.397 × weight in kg) + (4.799 × height in cm) - (5.677 × age in years)
For women: BMR = 447.593 + (9.247 × weight in kg) + (3.098 × height in cm) - (4.330 × age in years)
Glossary of Variables
- Age: Your age in years.
- Weight: Your weight in kilograms.
- Height: Your height in centimeters.
- BMR: Basal Metabolic Rate, the number of calories your body needs to maintain basic physiological functions.
Example Walkthrough
Let's say we have a male who is 30 years old, weighs 70 kg, and is 175 cm tall. Using the Harris-Benedict formula: BMR = 88.362 + (13.397 × 70) + (4.799 × 175) - (5.677 × 30) = 1664.7 kcal/day.
Frequently Asked Questions (FAQ)
What is Basal Metabolic Rate (BMR)?
BMR is the number of calories required to keep your body functioning at rest. It accounts for the largest portion of your daily calorie needs.
How accurate is the Harris-Benedict Equation?
While generally accurate, the Harris-Benedict Equation provides an estimate. Factors such as muscle mass and overall health can affect individual BMR.
Can BMR change over time?
Yes, factors like age, weight changes, and muscle mass can influence BMR over time.
Why is knowing my BMR important?
Understanding your BMR can help you tailor your diet and exercise routine to better meet your health and fitness goals.
How can I increase my BMR?
Building muscle and engaging in regular physical activity can increase your BMR as muscle tissue burns more calories than fat tissue at rest.
Formula (LaTeX) + variables + units
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For men: BMR = 88.362 + (13.397 × weight in kg) + (4.799 × height in cm) - (5.677 × age in years) For women: BMR = 447.593 + (9.247 × weight in kg) + (3.098 × height in cm) - (4.330 × age in years)
- T = property tax (annual or monthly depending on input) (currency)
- Wikipedia - Harris-Benedict Equation — en.wikipedia.org · Accessed 2026-01-19
https://en.wikipedia.org/wiki/Harris%E2%80%93Benedict_equation
Last code update: 2026-01-19
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