Estimate your likely conception date based on your due date or last menstrual period.
Determine your probable conception date based on your due date or last menstrual period.…
Estimate your due date and track your pregnancy week by week. Enter your last menstrual period date …
Find your ovulation date and most fertile days. Enter your cycle details to optimize your chances of…
Predict your next period, fertile window, and ovulation date. Enter your last period date and averag…
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.
Conception occurs when a sperm fertilizes an egg, which typically happens in the fallopian tube. For most women with regular cycles, ovulation (the release of an egg) occurs approximately 14 days before the start of the next menstrual period.
The most fertile period (when conception is most likely to occur) includes the day of ovulation and the five days before it. This is because sperm can survive in a woman's reproductive tract for up to five days, while an egg is typically viable for only 12-24 hours after ovulation.
This calculator provides estimates based on average cycle patterns. Every woman's body is different, and many factors can affect ovulation timing. For the most accurate tracking, consider using additional methods such as basal body temperature charting, ovulation predictor kits, or fertility monitoring apps.
If you're trying to conceive, having intercourse every 1-2 days during your fertile window maximizes your chances. If you're trying to avoid pregnancy, remember that this calculator provides estimates only and should not be used as a reliable form of birth control.