Clomid Ovulation Calculator

Your details

Both medications stimulate ovulation but have slightly different timing profiles. Letrozole ovulation can lag a bit longer after the last pill.
The calendar date you took your first tablet of this medication cycle.
Most standard Clomid and Letrozole regimens run 5 days. Your doctor may prescribe a shorter or longer course.
The day of your menstrual cycle on which you took the first tablet. Day 1 is the first day of full flow. Days 3-5 are most commonly prescribed.
Expected ovulation date
August 19, 2026

Most likely day of egg release (median timing)

Last pill dateAugust 12, 2026
Ovulation windowAugust 17, 2026 to August 22, 2026
Peak fertility (best days to try)August 17, 2026 to August 19, 2026
Implantation windowAugust 25, 2026 to August 31, 2026
Earliest reliable pregnancy testSeptember 2, 2026
Estimated due date (if conceived)May 10, 2027 to May 15, 2027
  • First pill
  • Last pill (5-day course)
  • Ovulation window starts
  • Expected ovulation
  • Ovulation window ends
  • Implantation window
  • Pregnancy test

Expect ovulation around August 19, 2026 after your 5-day Clomid course.

  • Your expected ovulation is on August 19, 2026, but the window extends from August 17, 2026 to August 22, 2026 - ovulation can vary even on medication.
  • The best days to try to conceive are August 17, 2026 to August 19, 2026, the two days before expected ovulation through ovulation day itself. Conception is not possible from intercourse after ovulation, so do not save these days for later.
  • If implantation occurs you can expect it between August 25, 2026 to August 31, 2026. Wait until September 2, 2026 to test for the most reliable result.
  • Starting Clomid on cycle day 5 is a common regimen; some doctors prefer day 3 to allow a slightly larger follicle pool.

Next stepUse ovulation predictor kits (OPKs) starting 3-4 days before your expected ovulation date to pinpoint the LH surge. Pair with ultrasound monitoring if your doctor recommends it.

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