Due Date Calculator

Use our pregnancy due date calculator by plugging in either the date of your last menstrual cycle or the date you know you conceived. The calculator will do the rest.

How is my due date calculated?

There are several ways your due date is determined. If you happen to know the day you conceived, you can count 38 weeks from that day to find your due date. (Human gestation takes about 38 weeks.)

But very few expectant moms know exactly when they conceived. Even if you only had sex once during your fertile period, you wouldn’t conceive on that day unless you happen to be ovulating. Sperm can live for up to five days inside your fallopian tubes. So, it could be up to five days after you have sex that you release an egg (ovulate) and it gets fertilized by a waiting sperm. That’s the day you conceive.

Tell us the date of your last menstrual period;


Select a date
Select a month
Enter the year



Due date, conception date calculation results:


Estimated fertility dates:
to
Estimated conception date:
First trimester ends (12 weeks)
Secod trimester ends (27 weeks)
Estimated due date (40 weeks)
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