Free Period & Fertility Calculators

Track your menstrual cycle, predict ovulation, and plan with confidence. No signup required.

Our Free Calculators

Predict your next period and track your menstrual cycle with accuracy.

Find your ovulation date and identify your most fertile days.

Plan for pregnancy by knowing your best days to conceive.

All calculations happen in your browser. We never store your data.

Based on established medical research and cycle science.

No hidden costs, no premium features. Everything is free.

Get predictions in seconds. No signup or waiting.

Our full Period Tracker app offers cycle history, reminders, detailed predictions, and optional cloud sync - all while keeping your privacy first.