Biorhythms are a popular idea (often classed as pseudoscience) suggesting that human life is influenced by three repeating cycles from your date of birth: Physical (23 days), Emotional (28 days), and Intellectual (33 days). Some people find the concept useful for reflection or journalling — but it carries no scientific guarantee and should be treated as entertainment.
Values are shown as signed decimals in the range -1.00 to +1.00 where +1.00 is a theoretical “peak” and -1.00 a “low”. The cycles are continuous and repeat indefinitely, so you can use the same calculator on any date to see how your biorhythm changes over time.
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