Menstrual Cycle & Next Period Predictor
Predict upcoming menstrual cycle dates and ovulation phases.
Tool inputs stay in your browser · optional AI search sends your query
Good to know: Calculates future cycle projections based on your recorded typical cycle length and bleeding duration.
How to use it (step by step)
- 1Fill in the boxes: “Start date of last period”, “Average cycle length (days)”, “Period bleeding duration (days)”. Example numbers are already there so you can see how it works; replace them with yours.
- 2The result updates instantly as you type (on a phone it is below the boxes).
- 3The bold line is the main answer. Tap Copy next to any value to copy it.
Words to know
- Average (mean) / median
- Average = add everything and divide by how many. Median = the middle value when sorted; it is not pulled by extreme values.
- Bleed / trim / crop marks
- Trim is the final cut size. Bleed extends color beyond the cut. Crop marks show the printer where to cut.
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