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Period Calculator

Predict your next period date and fertile window based on your cycle history.

Cycle Predictions

Next Period Date-
Estimated Ovulation Date-
Fertile Window-

How to Use the Period Calculator

  1. Enter the first day of your last period.
  2. Enter your average cycle length.
  3. Click Calculate to see predictions.

What is a Period Calculator?

A period calculator predicts your next menstrual cycle and fertile window based on the length of your average cycle.

This is an estimate for informational purposes only, not medical advice.

Frequently Asked Questions

How accurate are these predictions?

Predictions are based on average cycle length and may vary due to natural cycle irregularities.

🔗 Also try the Period Calculator on TipCalc.in