Ovulation Calculator

Track your menstrual cycle, predict ovulation, and identify your most fertile days with this simple calculator.

First day of your last period:

Average cycle length (days): Most cycles are between 21-35 days. If unsure, use 28.

Average period length (days): Typically 3-7 days. If unsure, use 5.

Your Fertility Summary

Disclaimer: This calculator provides estimates based on average cycle information. Actual ovulation can vary due to many factors including stress, illness, travel, or hormonal fluctuations. For medical advice, conception assistance, or contraception, please consult with a healthcare provider.