Pregnancy Calculator

Use the Pregnancy Calculator to:
  • Determine the due date
  • Calculate the likely conception date
  • Estimate the fetal age 
  • Determine the likely conception date when you know the birthday or due date. Download This Free Software

Last Menstrual Period:        

                              (MM/DD/YYYY format)

Average Length of Cycles:      (22 to 45)

                              (defaults to 28)

Average Luteal Phase Length:   (9 to 16)

                                                           (defaults to 14)






Estimated Conception:         

Estimated Due Date:           

Estimated Fetal Age:

Key Terms -

Menstrual Period - The monthly flow of blood and cellular discharge from the uterus that begins at puberty in women.

Luteal Phase - The portion of the menstrual cycle that begins with the formation of the corpus luteum and ends with the start of the menstrual flow, usually 14 days in length.

Fetal Age - the age of an embryo counting from the time of fertilization.

Due Date - The estimated calendar date when a baby will be born, the date the baby is due to be born. It is also called the estimated date of confinement (EDC).

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