Period Calculator and Cycle Tracker
Estimate your next three period windows from the first day of your last period and your typical cycle. It also shows a rough ovulation and fertile-window estimate. Nothing is saved or sent; results are educational and must not be used as contraception or medical advice. Calculate it clearly with Figur.
Period Calculator and Cycle Tracker
Estimate your next three period windows from the first day of your last period and your typical cycle. It also shows a rough ovulation and fertile-window estimate. Nothing is saved or sent; results are educational and must not be used as contraception or medical advice.
Method and assumptions
Figur projects repeating cycles from the first day of the last period using the reported typical cycle length. It estimates ovulation as 14 days before the next period and the fertile window as five days before through one day after.
- The entered start date and typical durations are reasonable approximations.
- Each future cycle is assumed to match the typical cycle even though real cycles may vary.
- Ovulation is not observed directly; the fertile window is a calendar approximation and not contraception.
Educational information, not medical advice or a diagnosis. Consult a qualified health professional for care, symptoms, fertility, pregnancy, or nutrition needs.
Sources and references
Frequently asked questions
Does Figur save my cycle dates?
No. This calculator runs in your browser and does not save, sync, or create a cycle history.
Can I use the fertile window to prevent pregnancy?
No. Ovulation and cycle timing can shift, even in usually regular cycles. Do not use this estimate as contraception or to diagnose a health condition.