"When is my next period?" is usually a one-answer question — but planning around a cycle over several months benefits from seeing further ahead.
Next period predictor, six cycles instead of one
Starting from an August 1 last period with a 28-day average cycle, this calculator lists all six upcoming estimated start dates at once — August 29, September 26, October 24, and onward — rather than making you recalculate one prediction at a time.
Menstrual cycle calculator, the math behind each date
Each prediction simply adds the cycle length again: last period plus one cycle, plus two cycles, and so on. It's straightforward arithmetic, but seeing it laid out as a table makes upcoming planning — travel, events, or just general awareness — easier than doing the addition manually each time.
When is my next period, and why predictions get less certain further out
These are estimates based on your average cycle length staying consistent — actual cycles vary in length even for people with regular periods, so treat dates further in the future as less certain than the next one or two.
