🌸 AI-Powered Predictions

Safe Days Calculator – Estimate Fertile & Non-Fertile Days

This safe days calculator helps you estimate fertile and non-fertile days based on your menstrual cycle. Enter your cycle details to receive a personalized cycle calendar.

Enter Your Details

Select the first day of your most recent menstrual period.

The number of days from the start of one period to the start of the next. Most cycles range from 21 to 35 days.

Your longest recent cycle. If your cycles are regular, this can match your shortest cycle length.

💝 Note: This calculator provides personalized estimates. For medical advice, please consult with a healthcare professional.

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AI Accuracy

Advanced algorithms for precise cycle predictions

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100% Private

Your data never leaves your device

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Mobile Friendly

Track your cycle anywhere, anytime

How the Safe Days Calculator Works

This calculator estimates fertile and safe days using cycle length, period duration, and ovulation timing. Results are based on calendar method principles.

Accuracy & Limitations

Menstrual cycles can vary due to stress, health conditions, or hormonal changes. This tool provides estimates and should not be used as the sole method of contraception.

Medical Disclaimer

This tool is for educational purposes only and does not provide medical advice. Consult a qualified healthcare professional for personalized guidance.

Learn more about menstrual cycle phases and tracking on the My Cycle Safe AI homepage.

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