Free Professional Tool

BMR Calculator

Calculate your Basal Metabolic Rate (BMR) utilizing Harris-Benedict formulas with responsive daily caloric activity breakdowns.

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5 Yrs 95 Yrs
90 cm 240 cm
20 kg 180 kg
Basal Metabolic Rate (BMR)
0 kcal/day
Sedentary (No Exercise)
0 kcal
Light Activity (1-3 days/wk)
0 kcal
Moderate Active (3-5 days/wk)
0 kcal
Very Active (6-7 days/wk)
0 kcal
Athlete / Heavy Work
0 kcal

About BMR Calculator

Calculate Your Basal Metabolic Rate (BMR) and Daily Energy Expenditure

Our BMR Calculator is an advanced health diagnostic utility designed to compute your Basal Metabolic Rate—the exact number of calories your body burns at rest to maintain critical life functions like breathing, circulation, and cell production.

The Harris-Benedict Equation & TDEE

Basal Metabolic Rate is calculated using the globally recognized **Harris-Benedict equation**, which factors in biological sex, age, height, and weight. By combining your BMR with your daily physical activity index, you can calculate your **TDEE (Total Daily Energy Expenditure)**—the exact calorie baseline needed to maintain your weight.

The standard physiological equations utilized by our BMR engine are:

  • Men: BMR = 88.362 + (13.397 * Weight_kg) + (4.799 * Height_cm) - (5.677 * Age_years)
  • Women: BMR = 447.593 + (9.247 * Weight_kg) + (3.098 * Height_cm) - (4.330 * Age_years)

Key Features:

  • Biological Sex Selector Pills: Dual fast-action buttons with active classes to select sex.
  • Complete Daily Caloric Intake Table: Computes the exact calories needed to maintain, lose, or gain weight based on activity levels.
  • Granular Control Sliders: Smooth interactive range sliders for age, height, and weight.

Common Questions

BMR represents the baseline quantity of daily calories your body requires to perform elementary metabolic functions (like cell respiration and vascular circulation) completely at rest.
To lose weight, eat fewer calories than your Daily Calorie Expenditure (TDEE). To gain weight, establish a caloric surplus above your baseline expenditure.
It is a globally benchmarked physiological formula published in 1918 and updated in 1984, establishing baseline metabolic rates based on age, height, weight, and biological sex.
No. Consuming fewer calories than your baseline BMR can trigger starvation responses, slowing metabolism. Restrict calories below your total activity TDEE baseline, not below your resting BMR.

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