Biorhythm Calculator
Enter your birth date to chart your physical (23-day), emotional (28-day), and intellectual (33-day) cycles.
Your Details
Results
Enter your birth date to see your cycles
How This Calculator Works
Biorhythm theory models three cycles as sine waves starting at zero on your birth date: a 23-day physical cycle, a 28-day emotional cycle, and a 33-day intellectual cycle. Each cycle's value on any day is sin(2ฯ ร days-since-birth รท period), shown here as a percentage from -100% to +100%. Days where a cycle crosses zero are marked as critical days for that cycle.
Frequently Asked Questions
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