Ovulation Calculator
Predict your ovulation date and fertile window to optimize your chances of conception.
Fertility Levels
Estimated Ovulation Date
Sun, Sep 20
Next Period
Oct 4
Fertile Window
Sep 15 - Sep 21
Your Fertile Window
Sep
15
low
Sep
16
medium
Sep
17
medium
Sep
18
high
Sep
19
high
Sep
20
peak
Sep
21
low
Your Cycle Phases
Menstrual Phase
Period days
Sep 6 - Sep 10
Follicular Phase
Egg develops
Sep 11 - Sep 19
Ovulation Phase
Egg release
Sep 19 - Sep 21
Luteal Phase
After ovulation
Sep 22 - Oct 3
Understanding Ovulation
Ovulation occurs when an egg is released from the ovary, typically 14 days before your next period. The egg survives 12-24 hours, but sperm can survive up to 5 days, creating a fertile window of about 6 days.
Signs of Ovulation
Common signs include increased cervical mucus (egg-white consistency), slight temperature rise, mild pelvic pain (mittelschmerz), increased libido, and breast tenderness.
Tracking Methods
Track your cycles for several months for better predictions. Ovulation predictor kits detect LH surge 24-36 hours before ovulation. Basal body temperature tracking shows ovulation after it occurs.