Menstrual Cycle & Ovulation Calculator

Track your menstrual cycle to predict your next period and identify your fertile window. This can help with family planning or understanding your cycle better.

Enter your cycle details

First day of your last period

Select a date within the last 6 months

Cycle length

days

Average days between periods (21-45)

Period length

days

How long your period typically lasts (1-10)

Disclaimer: This calculator is for informational purposes only and should not replace professional medical advice. Patient.info does not store any of your personal or medical data in association with your answers. All answers are completely anonymous. Always consult a healthcare provider for personalised health guidance.