Period Tracker

Predict your next period, fertile window, and ovulation date based on your cycle length.

Educational Use Only

This tool is for informational purposes only and is not medical advice. Cycle lengths vary naturally. Consult a healthcare provider for medical concerns.

Your Cycle Details

Last Period Start Date

Average Cycle Length (days)

Average Period Duration (days)

Next Period

Wed, Jul 8, 2026

In 23 days

Ends: Jul 12

Fertile Window

Jun 19 – Jun 25

Days 9–15 of cycle

Highest chance of conception

Ovulation

Wed, Jun 24, 2026

Day 14 of cycle

Peak fertility day

Next 3 Cycles Forecast

Cycle 1

Period: Jul 8 – Jul 12

Fertile: Jun 19 – Jun 25

Ovulation: Jun 24

Cycle 2

Period: Aug 5 – Aug 9

Fertile: Jul 17 – Jul 23

Ovulation: Jul 22

Cycle 3

Period: Sep 2 – Sep 6

Fertile: Aug 14 – Aug 20

Ovulation: Aug 19

Period Tracker

Our Period Tracker helps you predict your next menstrual period, fertile window, and ovulation date based on your average cycle length. Track patterns over time to understand your body better.

How It Works

The calculator uses your last period start date and average cycle length to project upcoming cycles. Ovulation typically occurs around day 14 of a 28-day cycle, and the fertile window spans the 5 days before ovulation plus the day of ovulation itself.

Understanding Your Cycle

Menstrual Phase (Days 1–5): Period bleeding. Day 1 is the first day of your period.
Follicular Phase (Days 1–13): Hormones rise, preparing an egg for release.
Ovulation (Day 14): An egg is released. Peak fertility.
Luteal Phase (Days 15–28): The body prepares for potential pregnancy.

Important Note

Cycle lengths naturally vary from 21 to 35 days. Stress, illness, and lifestyle changes can all affect timing. This tool provides estimates only — not medical advice.

Our Period Tracker helps you predict your next menstrual period, fertile window, and ovulation date based on your average cycle length. Track patterns over time to understand your body better.

How It Works

Understanding Your Cycle

Menstrual Phase (Days 1–5): Period bleeding. Day 1 is the first day of your period.
Follicular Phase (Days 1–13): Hormones rise, preparing an egg for release.
Ovulation (Day 14): An egg is released. Peak fertility.
Luteal Phase (Days 15–28): The body prepares for potential pregnancy.

Important Note

Cycle lengths naturally vary from 21 to 35 days. Stress, illness, and lifestyle changes can all affect timing. This tool provides estimates only — not medical advice.