Health

Female Safe Period Calculator

Calculate safe periods, dangerous periods, and ovulation day based on your menstrual cycle. For reference only.

Calendar view Offline

Input

Cycle information

Last menstrual period (LMP)

Cycle length (days, default 28)

Period duration (days)

Legend

Dangerous period (fertile)

Ovulation day

Safe period

Menstrual period

Result

This month's calendar

Fill in the information and click Calculate.

Disclaimer: This tool is for reference only and cannot be used as contraception. Individual cycles vary; please consult a doctor for medical advice.