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To estimate the length of your pregnancy, enter the first day of your last period and then press 'calculate'.

First Day of Last Menstrual Period: Select Date
Estimated Length of Pregnancy:
Estimated Conception Date:
Estimated Due Date:



The Pregnancy Calculator above is an estimation of weeks from reported last normal menstrual period and does not constitute medical advice.

A missed period does not necessarily mean that you are pregnant, and having a period does not mean you are not pregnant. Only an exam, pregnancy test, or ultrasound by a physician can confirm pregnancy and approximate length of pregnancy. The calculator should be used as a guide only and should not be relied upon for weeks of pregnancy, conception date, or due date.

A-Z Women’s Center currently provides abortions up to 19.6 weeks gestation based on ultrasound examination. All patients must have an ultrasound (sonogram), which is included in the basic fee. An ultrasound is necessary to confirm the pregnancy and insure proper calculation of the gestational age. All doctors date pregnancies from the first day of your LAST MENSTRUAL PERIOD, not from the date of conception.