Have you noticed that some days everything goes smoothly, while others everything falls apart? The theory of biorhythms explains this through cycles that start at the moment of birth. You can calculate your biorhythms right now: the biorhythm calculator is free and needs no registration.
The three biorhythm cycles
According to the theory, three rhythms operate within a person. The physical cycle (23 days) governs energy, stamina and health. The emotional cycle (28 days) governs mood, feelings and relationships. The intellectual cycle (33 days) governs concentration, memory and decision-making. Each cycle smoothly oscillates between rise and fall.
How biorhythms are calculated
The calculation is based on the number of days lived since birth. For each cycle the value is computed along a sine wave: the phase depends on which day of the cycle you are on. Our calculator takes your date of birth, counts the days lived and shows all three percentages for today, as well as a chart for the coming days.
What critical days are
Critical days are when a cycle's curve crosses zero — switching from rise to fall or vice versa. At such moments the corresponding area is unstable: on a physically critical day it is easier to get tired or injured, on an emotionally critical one to lose your temper. This is not a cause for worry but a hint to be more careful.
How to use it
Plan important matters for days of rise: negotiations and creativity at the peak of the intellectual and emotional cycles, sport and exertion at the peak of the physical one. On critical days it is better not to make fateful decisions. The Tarot card of the day will help complete the picture of the day.
Open the biorhythm calculator and build your chart.
