Calculation method
Physical: 23 days · Emotional: 28 days · Intellectual: 33 days · Intuitive: 38 days. The yellow sum is their average.
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Biorhythm & Family Planning â Man
Four traditional sine curves and their average for the man.
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Biorhythm & Family Planning â Man
Four traditional sine curves and their average for the man.
Choose an analysis
01 / INPUTS
Date range and personal details
Info
Remember my details for next time
If you choose, your birth dates and cycle details will appear automatically on future visits. The chart will start from today each time.
I explicitly agree to save my birth dates and cycle information in a browser cookie on this device for 180 days.
Birth dates and menstrual data are private. The cookie is set only with your agreement, sent only to this calculator, and can be erased at any time. No profile database.
02 / RESULTS
Chart results
Man (01.01.1990)
03 / INFORMATION
Background and notes
Scientific notice
Traditional biorhythm theory is not scientifically validated. Sex prediction has no proven predictive power. Calendar-based ovulation estimates are unreliable and must not be used for contraception or medical planning.
How the male biorhythm is calculated
Four sine-wave cycles of 23, 28, 33 and 38 days are calculated from the date of birth. You can choose the date range, display the daily values and print the chart.
The traditional biorhythm theory lacks scientific validation. This chart is for personal interest and entertainment, not for medical decisions.