Accessibility: [Main menu] Nutrition -> [Sub menu] Caloric Estimator
This caloric estimator is based on BMR calculation. To find more about the calculation and get theoretical background click
here.
In order to get your daily caloric need fill in/verify all data (in case active user's data exists, it is filled in automatically). Also select activity level and click "Calculate". You'll get your RMR, factor (according to activity level) and daily caloric needs.
Screenshot fragment from Levolution:
