Menstrual Cycle Calculator
Enter cycle data
d
d
Next Period
—
Period
Fertile window
Ovulation day
—
days to period
—
ovulation date
—
fertile days
—
cycle day
Next 6 Cycles
مساحة إعلانية
About this Tool
How does the menstrual cycle calculator work?
The tool predicts future periods based on the first day of your last period and your average cycle length.
Cycle Phases
- Menstruation (days 1–5): Shedding of the uterine lining.
- Follicular phase: Egg maturation.
- Ovulation (day ~14 of 28-day cycle): Egg release — peak fertility.
- Luteal phase: Uterus prepares for possible fertilization.
Fertile Window
Highest chance of conception is in the 5 days before ovulation and on ovulation day itself.
⚠️ This tool provides estimates only. Cycles vary month to month. Consult your doctor for medical advice.
مساحة إعلانية
Main Categories
Money & Business
Daily Life
Content & Creative
Challenges & Games