Calculate Safe Periods
Enter your cycle information to calculate safe periods
Your Safe Periods
Safe Period 1
Start to End
Lower Pregnancy Risk
Fertile Window
Start to End
Higher Pregnancy Risk
Ovulation: Date
Safe Period 2
Start to End
Lower Pregnancy Risk
Important Information
Safe periods are times when pregnancy is less likely to occur.
This method is not 100% reliable and should not be used as the only form of contraception.
Warning: This calculator is for educational purposes only and does not replace professional medical advice.
Medical Disclaimer
The rhythm method has a high failure rate. Consult with your healthcare provider for reliable contraception options.




