🌸 Period Tracker & Cycle Calculator

Enter your last period date and cycle details to predict your next period, fertile window, ovulation day, and more.

☁️ Cloud Save with Google (Optional)

Sign in with Google to save your cycle data to your own Google Sheet — synced across all your devices. Your data is stored in your Google Drive, not on our servers.

① Your Cycle Details

Last Period Start Date

Average Cycle Length (days between periods)

Typical range: 21 – 45 days

Period Duration (how many days it lasts)

Typical range: 2 – 10 days

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Select your last period start date above to see your cycle predictions.

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Are you pregnant?

Use the same LMP data to track your due date, week, baby size, and milestones.

🤰 Pregnancy Calculator →

⚠ Health Disclaimer: This tool provides estimates based on average cycle patterns and is intended for informational purposes only. Cycles vary between individuals and can be affected by stress, health conditions, medications, and other factors. This is not a substitute for medical advice and should not be used as a method of contraception. Consult a healthcare professional for medical guidance.