Melatonin Phase Response Curve Tool

Calculate the best time to take melatonin to advance or delay your circadian rhythm.

Calculator

JavaScript Required. However, the math is simple: Calculate the best time to take melatonin to advance or delay your circadian rhythm. Read below for the exact formulas used.

Current Natural Sleep Onset Time

Goal Phase Shift

How it works

This tool uses standardized behavioral health formulas to calculate outputs.

Assumptions

Adult metabolic rates.
Standard circadian profiles.

Internal References

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