pregnancy calculator by due date

Pregnancy Calculator By Week and Due Date

How to calculate pregnancy weeks and due date?

The most exciting yet difficult thing to do when you are expecting is to find out when you started and when is your due date. Here are a couple of ways you can do it by yourself before going to your OB/GYN. 

When You Had Your Last Period?

This is a very simple and easy way to find a rough estimate of your due date. All you have to do is take a regular calendar and mark the first day you had your period. From there, you can add 40 weeks or 9 months, and boom! You have your due date. Your baby will be delivered around this time, give or take a few days. This is a very rough and approximate way to calculate your due date, but it is still very accurate. 

The Date Of Conception

Most women know exactly the day when the baby is conceived because they track their ovulation and they keep a record of it. If you know the date, you’re sure that you conceived by adding 40 weeks or 9 months to the date of ovulation. This is also a very similar way to the above-mentioned method, but you generally have to give some days to let the conception happen. 

How To Calculate Pregnancy Weeks?

There is no right way to calculate pregnancy weeks and how far along are you. But you can do a rough estimate by seeing how many days has it been since you missed your period. You can take a pregnancy test and check if you are pregnant or not. From there, you can start counting down the days when you last missed your period. This will give a rough timeline of how far along you are.

The right date and weeks will be told by the doctor themselves when they check your baby with an ultrasound. They will give you the exact time and age of your baby in the belly. So, it’s best to book a doctor’s appointment as soon as you find out that you’re pregnant. You will get a better idea through a professional. Alternatively, get help from a pregnancy calculator to determine the weeks yourself.

Can Your Due Date Change?

Your baby doesn’t work on a strict pregnancy calendar. It will come out when it wants to and when the time feels right. This means it can come out earlier than the due date or it can come out days later than the due date. This doesn’t mean that there’s anything wrong with your body, baby, or pregnancy, it’s just divine timing.

When the time is right and the baby is ready to come out, no doctor or due date can level the determination of a baby who wants to be brought into the world. 


There you have it! These ways are super close and precise to the real deal. Your sonologist will be able to determine the right time through the ultrasound, but doing it yourself has a good thrill to it. Use a pregnancy calculator to make the calculation easier.

One thought on “Pregnancy Calculator By Week and Due Date

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