Pregnancy Calculator

One of the first questions most women want to know when they find out they're expecting is "how many weeks pregnant am I?" A pregnancy due date calculator will use the date of your last menstrual period and the usual length of your cycle to calculate your pregnancy due date, or the date you are 40 weeks pregnant. The pregnancy due date calculator still doesn't answer the question, "how many weeks pregnant am I?" For this you need to count back from 40 weeks to today's date, or use a week by week pregnancy calculator. "How many weeks pregnant am I?" Now you know.

Use our Pregnancy Calculator to find out your Estimated Due Date (EDD) which is calculated using the first day of your Last Menstrual Period (LMP). Our Pregnancy Calculator below will give you a guide to your due date by calculating 40 weeks gestation from the first day of your last period.

Calculate Your Due Date

Select the date of the first day of your last period: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 2011 2012
Select the number of days in your menstrual cycle: 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

If your typical menstrual cycle was not 28 days, this may be taken into account when calculating your dates although it will only alter your due date slightly - you can experiment with this above.

This calculator offers a guide only. Please consult with your health professional to find your exact due date as there may be other factors which affect this. Blood tests and ultrasounds during your pregnancy will give you further indication of your estimated due date.

Mum Zone wishes you all the very best with your pregnancy!