Period Calculator & Cycle Tracker

Predict upcoming menstrual cycles, fertile windows, ovulation peaks, and PMS symptom dates with scientific accuracy.

Cycle Information

First Day of Last Period

Average Cycle Length28 Days

Standard range: 21 to 35 days (Normal average is 28 days)

Period Duration (Flow Days)5 Days

Normal bleeding duration: 3 to 7 days

Current Status: Day 15 of CycleOvulation Window

Next Expected Period

Oct 28, 2026

In ~14 Days

Highest fertility peak. Luteinizing hormone (LH) surge releases an egg.

Next 3 Cycles Forecast

1Oct 28, 2026 – Nov 1, 2026

Fertile: Oct 9 – Oct 15Ovulation: Oct 14, 2026

2Nov 25, 2026 – Nov 29, 2026

Fertile: Nov 6 – Nov 12Ovulation: Nov 11, 2026

3Dec 23, 2026 – Dec 27, 2026

Fertile: Dec 4 – Dec 10Ovulation: Dec 9, 2026

Forecasts are estimates based on standard hormonal rhythms. Stress, travel, illness, and medication can naturally cause cycle variations.

Frequently Asked Questions

Common questions about menstrual cycles, ovulation timing, and period prediction.

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About Period & Menstrual Tracker

Predict your upcoming menstrual cycle dates, PMS symptom windows, and fertile phases with scientific rhythm and luteal phase calculations.

Key Highlights & Capabilities

Accurate 6-month period and ovulation forecasting

Highlights fertile window and peak conception days

Custom cycle length and luteal duration adjustments

Helps track irregular cycles and plan schedules ahead

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