Did you know that the biggest secret to getting pregnant is timing? The time it takes to get pregnant is driven by knowing when you ovulate. Use this calculator to understand your personal fertility calendar. Knowing the days you are most fertile is critical.
Let's find the average length of your menstrual cycle.
Enter the day of the first day of each cycle below starting with the most recent
Most recent cycle
1 cycle past
2 cycles past
3 cycles past
For the best outcome, we recommend to use an ovulation prediction kit (OPK) to predict your ovulation. Select a kit:
Clearblue ovulation prediction kit
EPT ovulation prediction kit
First Response ovulation prediction kit
Other ovulation prediction kit
I am NOT using any ovulation prediction kit
Calculating your average cycle length: Enter the date of the first day of at least 2 menstrual periods to help us calculate your cycle length (in days). If you can enter two more dates of the first day of past periods, that would help us get a better sense of your average cycle length.
Irregular menstrual cycles? Trying to time ovulation on your own may not work if you have irregular cycles, and may cause you to waste precious time. You may not be ovulating regularly. Consult your doctor if you are having irregular menstrual cycles or you're concerned for any reason.
Why do we also recommend using OPK? This calculator can provide your fertile days based on your average menstrual cycle length. It can also help you narrow down when you should start using an ovulation kit. OPKs detect the Luteinizing Hormone (LH) surge approximately 24-36 hours prior to ovulation. This time is your most fertile window for intercourse.
Your results are in! Remember the biggest secret to getting pregnant is timing? Your success rate to get pregnant is driven by knowing when you ovulate. Below are the results to your most fertile dates as well as recommendation on when to take an ovulation prediction kit.
Want to get the full scoop on predicting your most fertile dates?