Predict your next menstrual period based on your last cycle date and average cycle length.
Next period starts:
Expected period ends:
Estimated ovulation day:
Fertile window:

About This Calculator

This next period calculator helps estimate when your upcoming menstrual cycle may begin. It is useful for planning, cycle awareness, and understanding general reproductive patterns.

How It Works

The tool adds your average cycle length to the first day of your last period. Ovulation is estimated to occur about 14 days before the next cycle begins.

Important Information

Menstrual cycles vary naturally. Stress, illness, travel, or lifestyle changes can affect timing. Results are estimates, not guarantees.

Health Advice

If your cycle is frequently irregular or you experience severe pain or unusual symptoms, consider speaking with a healthcare professional.

FAQs

Is this accurate? It provides an estimate based on averages.
Can I use this with irregular cycles? Results may be less precise.
Does it replace medical advice? No, it’s an informational tool only.