Find your fertile window and ovulation date based on your last period and cycle length.
Ovulation date
Fertile window
Wed, Jun 24 – Tue, Jun 30
Days to ovulation
The Ovulation Calculator predicts your ovulation date and fertile window based on your last menstrual period and cycle length.
Ovulation = LMP + cycle length − 14 days. The luteal phase (post-ovulation) is nearly always 14 days regardless of cycle length; it is the follicular phase that varies.
The 6-day window ending on ovulation day has the highest pregnancy probability. Days −5 to 0 relative to ovulation are considered fertile.