biorhythm chart, biorhythm calculator and calendar

Primary biorhythm cycles

23 days physical cycle, 28 days emotional cycle and 33 days intellectual cycle. Each of these cycles oscillates following a sine wave between positive and negative values.
Critical days are the days when the wave crosses the zero line. Women are more affected by the emotional biorhythm, men are more affected by the physical biorhythm.




Secondary biorhythms