The biorhythm calculator maps your internal energy cycles using your date of birth. These cycles are fixed biological patterns that rise and fall in consistent rhythms. This tool shows you what part of each cycle you’re in right now. The result is a chart that helps you decide when to move, when to rest, and when to brace for impact. (As a disclaimer, keep in mind that biorhythms are generally considered a pseudoscience.)

There are three primary biorhythm cycles: physical, emotional, and intellectual. The physical cycle runs every 23 days and rules over your strength, stamina, and motor coordination. If you’re planning a workout, a big move, or anything that demands serious energy, you want to be on the upswing of this one. The emotional cycle is 28 days long and affects mood, relationships, sensitivity, and intuition. Emotional lows indicate volatility. Knowing that in advance can save you from unnecessary drama. The intellectual cycle lasts 33 days and hits your brain: focus, memory, and problem-solving. If you’ve got mental heavy lifting to do, this one matters.

The biorhythm calculator turns these waves into a graph. Peaks indicate high energy. Troughs mark low points. But the most important moments are the transition days, especially where the wave crosses the centre line. Those are critical points. On these days, your energy is unstable. It might spike or crash. You might be brilliant, or completely unhinged. The chart shows probabilities.

To get a current Biorhythm Chart, fill out the short form below.

Name:

Date of Birth:

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Days in Cycle:

14 Days30 Days60 Days

Chart Size:

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Compatibility Biorhythms

For even more insight, use the biorhythm compatibility calculator. Enter your birth date alongside someone else’s, and it compares your cycles. This can show where you’re in sync, and where you’re destined to step on each other’s nerves. Use it for romantic relationships, business partnerships, friendships, or rivalries. Any two people will create patterns. Some are harmonious. Some are toxic.

The biorhythm calculator shows you waveforms based on math, not myth. Track the rhythms and watch the patterns repeat. Start timing your work, rest, confrontations, and risks based on your own energy curve.

Most people walk into critical days without even knowing it. That’s when they mess up. This tool puts the map in your hands. When you know your rhythm, you stop blaming fate for your own bad timing. You see it coming.