MyHappyAura tools
Trying to Conceive Calculators & Tools
Free fertility calculators that work out your fertile window, ovulation day and conception chances in seconds. Everything runs privately in your browser, and nothing you enter is sent anywhere.
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Trying to Conceive
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Ovulation Calculator
Fertile window, ovulation day and test date on a colour-coded calendar. Calendar PDF -
Fertility Window Estimator
Irregular cycles? Get a fertile window based on your real cycle history. Saves history PDF Chart
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About our fertility tools
Free fertility calculators that work out your fertile window, ovulation day and conception chances in seconds. Everything runs privately in your browser — nothing you enter is sent anywhere.
Private by default
Every calculation runs in your browser. Nothing you type is sent to us.
Built on published standards
WHO growth standards, IOM guidelines and peer-reviewed research, with sources on every page.
Take it with you
Download PDFs, add dates to your calendar and back up trackers. No account needed.