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

Listeriosis

Pregnant women are at higher risk to get sick from eating food contaminated with the listeria bacteria compared to healthy nonpregnant persons. See our FACTSHEET

Stress

It is unlikely that stress alone is able to cause physical birth defects. See our FACTSHEET.