Conception Calculator
The Conception Calculator estimates a range of days during which a woman is most likely to conceive, as well as a corresponding due date based on a woman's average menstrual cycle.
The Fertile Window
Most Probable Conception Days
These are the 6 days when conception is most likely to occur, including the 5 days before ovulation and the day of ovulation itself. Sperm can survive in the female reproductive tract for up to 5 days.
Ovulation Window
The 5-day period centered around ovulation when the egg is released and available for fertilization. This is the peak fertility window.
Best Intercourse Days
The optimal 8-day window for intercourse to maximize chances of pregnancy, including the 5 days before ovulation and 3 days after ovulation.
Important Notes
• This calculator is for educational purposes only
• Do not use as a form of birth control
• Cycle lengths can vary from month to month
• Consult with a healthcare provider for family planning
• Pregnancy tests are most accurate 14 days after ovulation
• Conception can occur up to 5 days after intercourse