Ovulation Calculator

Ovulation
Calculator

Estimate your fertile window by entering
the first day of your last period
and your average cycle length

Your menstrual cycle can give helpful clues about when ovulation may occur.

This calculator provides an estimate of your fertile window based on your cycle

Every cycle is different, so this tool should be used as a general guide only.

Estimate Your Fertile Window

Every cycle is unique. This calculator provides an estimate only and should be used as a guide.

Helpful Tip

Ovulation calculators provide an estimate only. For a clearer picture of your cycle, you may also wish to use ovulation test strips or track your basal body temperature.

BUY OVULATION TEST STRIPS

Learn The Common Signs of Ovulation

Understanding the physical signs that may occur around ovulation can help you track your cycle with confidence.