| Next Period | hesaplanacak |
|---|---|
| Period 2 | hesaplanacak |
| Period 3 | hesaplanacak |
| Period 4 | hesaplanacak |
Scenario A saved. Change values and recalculate → Scenario B will appear.
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How to Predict Your Next Period
Menstrual cycles are counted from the first day of one period to the first day of the next. While the average cycle is 28 days, a normal cycle ranges from 21 to 35 days. Tracking your cycle helps you plan, recognize patterns, and detect irregularities.
What This Calculator Shows
- Predicted start date of your next period
- Next 6 months of predicted period dates
- Estimated cycle phase for any date
- Fertile window and estimated ovulation date
Menstrual Cycle Phases
| Phase | Days (28-day cycle) | What Happens |
|---|---|---|
| Menstrual | 1–5 | Uterine lining sheds |
| Follicular | 1–13 | Follicle develops, estrogen rises |
| Ovulatory | 14 | Egg released |
| Luteal | 15–28 | Progesterone rises, uterus prepares |
Factors That Affect Cycle Regularity
- Stress and major life changes
- Significant weight changes
- Intense exercise or changes in activity level
- Hormonal contraceptives
- PCOS, thyroid disorders, and other health conditions
When to See a Doctor
Consult a healthcare provider if: periods are consistently longer than 7 days, bleeding is extremely heavy (soaking a pad every hour), cycles are consistently shorter than 21 or longer than 35 days, or you miss 3 or more consecutive periods.
How to Use This Calculator
Using our calculator is simple: enter the required values into the input fields and click the calculate button. Results are displayed instantly on screen. You can adjust the values and recalculate to compare different scenarios and find the best option for your situation.
Frequently Asked Questions
| Question | Answer |
|---|---|
| How accurate are the results? | We use standard formulas and up-to-date 2025 rates. Individual circumstances may vary slightly. |
| Is this calculator free? | Yes, completely free and no registration required. |
| What should I do for exact figures? | For precise information, consult a relevant professional or official authority. |
| Does it work on mobile devices? | Yes, it works seamlessly on all devices and screen sizes. |
Important Notes
This calculator is provided for informational purposes only. For legal, financial, or medical decisions, always seek advice from qualified professionals. Calculation results do not constitute official documents. Legislative changes may affect results; please visit the relevant official website for the most up-to-date information. Our calculators are regularly updated to reflect current regulations and rates.
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