The application calculates biorhythm based on a selectable birthdate. The results are displayed in a colored curve line graph that breaks out the physical state, the emotional state and the intellectual state. The cycle are as follows: physical is 23 days, emotional is 28 days and intellectual is 33 days. The physical biorhythm determines human energy, strength, endurance and coordination of movement. The emotional biorhythm determines condition of the nervous system and mood. The intellectual biorhythm determines the creative abilities of the individual.