Pregnancy Calculator | International Biosciences UK


Calculate your expected due date:
When was the first day of your last menstrual period?
Number of days typically in your menstrual cycle:

Likely conception date:
End of first trimester (12 weeks):
End of second trimester (27 weeks):
Your due date is (40 weeks):
(1) Fetal age (from the conception date):

(2) How far along you are in your pregnancy:

How many weeks will you be pregnant on a given date?


Number of weeks you will be pregnant for:


On which date will you be pregnant for the given number of weeks?
(example: I want to see what the date will be when I am 30 weeks* pregnant)*
The number of weeks:

Calculated date:

Given the due date (or birth date), calculate the likely conception date:


Calculated conception date:

* Please note that the results of the pregnancy calculator are not a diagnosis. The calculations provided are estimates based on averages. You should also consult a specialist where necessary.

Calculate your expected due date:

How many weeks will you be pregnant on a given date?

On which date will you be pregnant for the given number of weeks?

Given the due date (or birth date), calculate the likely conception date: