Ovulation Calculator

Predict your ovulation date and fertile window based on your menstrual cycle length and last period date.

First Day of Last Period

Average Cycle Length (days)

Normal range: 21-35 days

Estimated Ovulation

Apr 13, 2026

Fertile Window

Apr 8 - Apr 14

Peak Fertility

Apr 11 - Apr 13

Next Period

Apr 27, 2026

Pregnancy Test

Apr 27, 2026

Cycle 1

Starts Mar 30

Ovulation: Apr 13

Fertile: Apr 8 - Apr 14

Cycle 2

Starts Apr 27

Ovulation: May 11

Fertile: May 6 - May 12

Cycle 3

Starts May 25

Ovulation: Jun 8

Fertile: Jun 3 - Jun 9