Use this Katy Hearn macro tool to calculate your personalized macronutrient needs based on your individual fitness goals and body measurements.

### How to Use the Katy Hearn Macro Calculator

To calculate your daily caloric needs, fill in the required fields including your weight, height, age, gender, and activity level. Then click “Calculate”. The number that appears in the Result field represents your total daily energy expenditure (TDEE), which is the number of calories you need to maintain your current weight.

### How it Calculates Results

The calculator uses the Harris-Benedict equation to estimate your basal metabolic rate (BMR), which is then adjusted based on your activity level to determine your TDEE. These formulas take into consideration different factors that influence your calorie needs.

### Limitations of the Calculator

This calculator provides an estimated TDEE based on averages and formulas. It does not account for specific personal characteristics like muscle mass, body composition, or metabolic health. For more personalized advice, please consult a healthcare or fitness professional.