CALCULATIONS
We calculate daily calorie requirements using the Mifflin-St. Jeor formula to determine the user’s Basal Metabolic Rate (BMR), which is the energy required to maintain basic physiological functions at rest.
Step-by-Step Calculation:
1. Input Gathering:
Users provide their age, gender, height, weight, activity level, and weekly weight goals during onboarding.
2. BMR Calculation:
For men:
BMR = 5 + (10 * weight) + (6.25 * height) - (5 * age in years) + 5
For women:
BMR = (10 * weight) + (6.25 * height) - (5 * age in years) - 161
3. Activity Adjustment:
BMR is multiplied by an activity factor based on the user’s reported activity level:
Sedentary: x 1.2
Lightly active: x 1.375
Moderately active: x 1.55
Very active: x 1.725
4. Caloric Adjustment for Goals:
Users can set a weekly goal to gain or lose weight:
Weight is converted to kilograms (if necessary) and used to calculate the caloric adjustment based on 7,700 kcal per kg , distributed evenly over 7 days.
Deficit or surplus is added to the Total Daily Energy Expenditure (TDEE) for a personalized calorie target.
5. Final Calorie Target:
The calculated total calorie needs incorporate the user’s baseline metabolism, activity level, and weight-related goals, ensuring a tailored daily calorie recommendation.
This approach ensures accurate and personalized calorie guidance for users, helping them effectively manage their health and fitness goals.