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Harris-Benedict Equation Calculator

Health
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Estimates your Basal Metabolic Rate (BMR) and Daily Calorie Needs based on the Harris-Benedict equation. This calculator provides an estimated calorie intake for maintaining current weight, and can be adjusted based on activity level.

How To Use

How to use this calculator

Start with your values, or try a preset.

Step 1

Enter Gender, Age (years), Height (cm), Weight (kg), and Activity Level in the units shown.

Step 2

Read Basal Metabolic Rate (BMR) and Daily Calorie Needs in the results panel. Results update as you change the inputs.

Step 3

Choose a preset to load an example, then adjust the values for your situation.

Worked Examples

Example calculations

See the inputs and their calculated results.

Male, Sedentary

Gender: Male; Age (years): 30 years; Height (cm): 175 cm; Weight (kg): 75 kg; Activity Level: Sedentary (little or no exercise)

Basal Metabolic Rate (BMR): 1,698.75 calories/day; Daily Calorie Needs: 2,038.5 calories/day

Female, Moderate Activity

Gender: Female; Age (years): 25 years; Height (cm): 163 cm; Weight (kg): 60 kg; Activity Level: Moderately Active (exercise 3-5 days/week)

Basal Metabolic Rate (BMR): 1,332.75 calories/day; Daily Calorie Needs: 2,065.7625 calories/day

Male, Very Active

Gender: Male; Age (years): 40 years; Height (cm): 180 cm; Weight (kg): 85 kg; Activity Level: Very Active (exercise 6-7 days/week)

Basal Metabolic Rate (BMR): 1,780 calories/day; Daily Calorie Needs: 3,070.5 calories/day

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Important

Use the result as an estimate and confirm any medical decisions with a qualified professional.