Calculate when you're ovulating

Knowing when you or your partner ovulates will help you time intercourse to increase your chance of conception. As sperm can live at their healthiest inside a woman for two to five days, you’re more likely to conceive when you have intercourse on, or around one to two days before ovulation.

Ovulation Calculator

Increase your chance of getting pregnant by determining when you are most fertile

Enter the date of the first day of your previous 3 periods.

Most recent:

Second most recent:

Third most recent:

Please select dates to continue.

Based on the data from your last three periods, your next most fertile days will be in

Recalculate

Frequently Asked Questions

Have sex one to two days before ovulation and during ovulation. 

Typically, a woman has a 28 day cycle and ovulates on day 14.

Sperm can live at their healthiest inside a woman for two to five days.

An egg lives for only a few hours after ovulation.

The key is to look out for changes in your cervical secretions. After your period you can feel quite dry for a day or so and then get a sticky, whitish type of secretion. Then, leading into ovulation, the secretion from your vagina will change to a clear, sticky, mucus-like discharge - a bit like egg white.