Ovulation Calculator

Ovulation is when an egg is released from your ovary, which is the fertile time of your menstrual cycle. During ovulation your cervix will undergo many changes. You may notice that your cervix is high, wet, open, and soft. Most of the time ovulation happens between 12 and 16 days before the start of the menstrual period. This means that if your cycle is 24 days, it will be on day 10; if it is 28 days it will occur on day 14; if it is a 35 day cycle it will be on day 21. Fill in the information below to predict when you ovulate.

When is the first day of your last period?

Please enter the first day of your last period!