Calculate Your Conception, Gestation & Due Dates

Using the first day of your last menstrual cycle you can figure out when you most likely conceived, how old your baby currently is, and when your baby's birth is expected. If you don't know the length of your cycle, leave that space blank and the average for most women will be used to calculate your information.

ONLY REQUIRED FIELD:
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)

     


Estimated Fertility Window:

     thru
Estimated Conception Date:

Estimated Gestational Age:
(how far along your pregnancy is)

Estimated Due Date:
(only 5% born on their due date!)