First day of your last periode

Average Length of Cycles

Most Probable Ovulation Date Ovulation Window Fertile Window Next Period Pregnancy Test Due Date if Pregnant

If you want to conceive, you have to figure out when you'll ovulate.

Our ovulation calculator gives the most probable ovulation date.

You just need to select the first day of your last period and your average menstrual cycle length.

Then it will give the following results:
- most probable ovulation date
- ovulation window
- fertile window
- next period
- pregnancy test
- due date if pregnant