Pregnancy Calculator for Conception, Gestation & Due Dates

Input Data
First Day of Last Menstrual Period: (first day of bleeding) *
(MM/DD/YYYY)
Average Length of Cycles: (from first day of your period to the first day of your next period)
(22 to 44 default = 28)
Output Data
Estimated Fertility Window:
to
Estimated Conception Date:
Estimated Gestational Age: (how far along your pregnancy is)
Estimated Due Date: (only 5% of babies are born on their due date!)

* Required Field