Circadian Rhythm Calculator

The circadian rhythm is your body’s internal 24-hour biological clock, governing sleep-wake cycles, hormone release, body temperature, and metabolism. Use this calculator for accurate, instant results.

The calculator uses the standard published formula for circadian rhythm calc. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.

This calculator works with inches. You can enter values in the units shown — the calculator handles all conversions internally.

The calculator applies the standard formula for this type of calculation. See the 'How It Works' steps above for the detailed formula breakdown.