Enter Your Cycle Information
Key Features
Your Cycle Overview
Next Period
Expected start:
Expected end:
Menstrual PhaseOvulation & Fertile Window
Ovulation date:
Fertile window:
Ovulation PhaseCycle Analysis
Current cycle day:
Current phase:
Days until next period:
Cycle Calendar
Enter your cycle details
Fill out the form to see your personalized cycle predictions and calendar.
Understanding Your Menstrual Cycle
How to Use This Period Calculator
Our period calculator helps you track and predict your menstrual cycle with accuracy. Here's how to get the most out of it:
- Enter your last period date: Select the first day of your most recent menstrual cycle.
- Set your average cycle length: This is the number of days from day 1 of your period to day 1 of your next period.
- Specify your period duration: How many days your period typically lasts.
- Review your results: See predictions for your next period, ovulation, and fertile window.
Understanding Your Results
The calculator provides:
- Menstrual Phase - When you're on your period
- Follicular Phase - After period ends, before ovulation
- Ovulation Phase - When an egg is released
- Luteal Phase - After ovulation, before next period
Benefits of Tracking Your Cycle
Regularly monitoring your menstrual cycle offers numerous advantages:
Health Awareness
Tracking helps identify irregularities that might indicate health issues like PCOS, thyroid problems, or hormonal imbalances.
Period Prediction
Know when to expect your next period to plan activities, trips, or special events with confidence.
Fertility Tracking
Identify your most fertile days if you're trying to conceive or want to avoid pregnancy naturally.
Symptom Management
Track PMS symptoms, mood changes, and physical changes throughout your cycle to better manage them.
Pro Tip
For best results, track your cycle for 3-6 months to establish your personal average cycle length, as it can vary from person to person.