Ovulation Calculator

A mother with her baby at Rush University Medical Center

Knowing when you ovulate is key when you’re trying to conceive. Your best chance of getting pregnant is to have sex during the most fertile time in your cycle, which begins five days before you ovulate and ends the day after ovulation. Use this calculator to help you predict when you will be ovulating.

We also encourage you to talk to your OB-GYN at RUSH to help you plan for pregnancy and prenatal care.

Your estimated fertile window is:


Your estimated ovulation date is:


This ovulation calculator is not a substitute for medical advice. Talk to your medical provider to plan your pregnancy or learn about birth control options. We do not collect any data entered using this tool.

Pregnancy Care Providers at RUSH

RUSH has pregnancy care providers in Chicago, Oak Park and Aurora/Fox Valley.

Meet our pregnancy care providers
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