How accurate is ovulation prediction?

Ovulation calculators provide estimates based on average cycles. For more accurate tracking, consider using ovulation predictor kits, basal body temperature tracking, or cervical mucus monitoring.

What if I have irregular cycles?

If your cycles vary significantly in length, ovulation prediction becomes less reliable. Consider tracking multiple cycles and consulting with a healthcare provider for personalized guidance.

Ovulation Calculator – Fertility Window Calculator

Calculate your ovulation date and fertile window based on menstrual cycle. Plan conception or natural family planning.

Ovulation Calculator – Fertility Window Calculator

Calculate your ovulation date and fertile window based on menstrual cycle. Plan conception or natural family planning.

Last Period Start Date*

First day of your last menstrual period

Cycle Length (days)

Average length of your menstrual cycle

Luteal Phase Length (days)

Length of luteal phase (optional)

🌸

Enter last period date to predict ovulation

Understanding Ovulation

Ovulation is the release of an egg from the ovary, typically occurring about 14 days before your next period. The fertile window includes the 5 days before ovulation and the day of ovulation, when pregnancy is most likely to occur.