Ovulation Calculator

Predict your ovulation date and fertile window to optimize your chances of conception.

First day of last period

Average cycle length (days)

Period length (days)

Fertility Levels

Peak - Ovulation day - highest chance

High - 1-2 days before ovulation

Medium - 3-4 days before ovulation

Low - 5 days before or after

Estimated Ovulation Date

Sat, Jan 24

Next Period

Feb 7

Fertile Window

Jan 19 - Jan 25

Your Fertile Window

Jan

low

Jan

medium

Jan

medium

Jan

high

Jan

high

Jan

peak

Jan

low

Your Cycle Phases

Menstrual Phase

Period days

Jan 10 - Jan 14

Follicular Phase

Egg develops

Jan 15 - Jan 23

Ovulation Phase

Egg release

Jan 23 - Jan 25

Luteal Phase

After ovulation

Jan 26 - Feb 6

Understanding Ovulation

Ovulation occurs when an egg is released from the ovary, typically 14 days before your next period. The egg survives 12-24 hours, but sperm can survive up to 5 days, creating a fertile window of about 6 days.

Signs of Ovulation

Common signs include increased cervical mucus (egg-white consistency), slight temperature rise, mild pelvic pain (mittelschmerz), increased libido, and breast tenderness.

Tracking Methods

Track your cycles for several months for better predictions. Ovulation predictor kits detect LH surge 24-36 hours before ovulation. Basal body temperature tracking shows ovulation after it occurs.