Period calculator
Estimate your next few period dates and fertile window from your usual cycle. A general guide for planning — not a medical assessment.
This tool is educational. Diagnosis and treatment choice must be confirmed by a fertility specialist after reviewing your history and reports.
Common questions
How does a period calculator work?
It estimates your next period dates by adding your average cycle length to the first day of your last period. It's a helpful general guide, but cycles naturally vary, so treat the dates as estimates rather than exact predictions.
Can I use it if my periods are irregular?
You can, but it will be less reliable, because irregular cycles make the next date harder to predict. Persistent irregularity is worth understanding — it can affect ovulation timing and is something a specialist can help map.
Take the next step — gently.
We will be honest about your chances, transparent about cost, and present at every step.
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