Ovulation Calculator

Your details

Days from the start of one period to the start of the next. A typical cycle is 21 to 35 days.
days
Days from ovulation to your next period. Usually 12 to 16 days, with 14 as the default. Set this if a luteinizing hormone kit or temperature chart has told you yours.
days
How many future cycles to list in the fertility calendar.
Estimated ovulation
24 May 2026
Fertile window19 May 2026 to 24 May 2026
Best days to conceive22 May 2026 to 24 May 2026
Ovulation falls on cycle day14of cycle
Earliest reliable pregnancy test7 Jun 2026
Next period starts7 Jun 2026
Due date if you conceive14 Feb 2027
14 day
Period<5Follicular5-9Fertile9-16Luteal16+

You likely ovulate around 24 May 2026, with a fertile window of 19 May 2026 to 24 May 2026.

  • Your best chance of conceiving is on 22 May 2026 to 24 May 2026, the two days before ovulation through ovulation day, when timed intercourse is most effective.
  • The fertile window spans roughly the five days before ovulation plus ovulation day, because sperm can survive several days while the egg lasts about a day.
  • If you conceive this cycle, a home pregnancy test should read reliably from about 7 Jun 2026, and your estimated due date would be 14 Feb 2027.

Next stepIf your cycles are irregular, track a few months or use an ovulation predictor kit to refine the timing.

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