Ovulation & Fertile Window Calculator
Track your ovulation day and fertile window to help plan your pregnancy journey.
Let's find out
When do you ovulate?
Typical range: 21 - 35 days
Your fertility window awaits
Enter your details to see your ovulation & fertile days
How is ovulation calculated?
Ovulation typically occurs about 14 days before your next period. We subtract 14 from your cycle length to estimate which day of your cycle you ovulate.
What is the fertile window?
The fertile window spans the 5 days before ovulation and ovulation day itself. Sperm can survive up to 5 days, so conception is possible during this entire window.
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