Ovulation Calculator

Format: YYYY-MM-DD (UTC calendar)
Typical range: 21โ€“45 days; default is 28.
Average is ~14 days (range 10โ€“16).
Estimates are based on cycle averages. Not a medical diagnosis or a substitute for professional advice.

Ovulation Calculator โ€“ Quick Cheat Sheet

Edge cases & notes
  • Irregular cycles: try using the most recent average; wide variability reduces accuracy.
  • Changing luteal length shifts the ovulation date relative to the next period.
  • All calculations use strict UTC calendar math with YYYY-MM-DD parsing.

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