Biorhythm Chart
Chart your biorhythms — presented as fun, not science.
Cycles from your birth date
Biorhythm theory claims that physical, emotional and intellectual cycles run from your birth date, and this charts them. It is presented as an entertaining curiosity, since the theory is not supported by scientific evidence.
Enter your birth date to chart your biorhythms.
An honest note on biorhythms
Biorhythm theory proposes that your life is influenced by regular cycles of set lengths — commonly a physical, an emotional and an intellectual cycle — that begin at birth and rise and fall predictably, supposedly indicating good and bad days for different activities. It became popular last century and some people still enjoy tracking it. In the interest of honesty, it is important to be clear that biorhythm theory has been tested and is not supported by scientific evidence — studies have found no validity to the idea that fixed cycles from your birth date predict how you will feel or perform, and there is no known mechanism for it. So it is best treated as an entertaining novelty rather than a real guide to your days. Human energy and mood do vary, of course, but they are influenced by countless real factors — sleep, health, stress, circumstances — not by simple fixed cycles counted from birth. Enjoy a biorhythm chart as a bit of fun if it appeals, but do not plan your life around it or take it as any real prediction of good or bad days.
Frequently asked questions
Are biorhythms scientifically valid?
No — the theory has been tested and found unsupported. Studies show no validity to fixed cycles from your birth date predicting how you feel or perform, and there is no known mechanism.
What actually affects my energy and mood?
Countless real factors — sleep, health, stress and circumstances — not simple fixed cycles counted from birth. Biorhythms are best enjoyed as a novelty.
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