pregnancy week-by-week calculator based on due date


Use these online pregnancy week-by-week calculator based on due date to find how many weeks you are pregnant. Additionally you can also find your due date and the number of weeks until your due date with these calculator.

Find out exactly how many weeks pregnant you are right now and plan ahead for your unborn baby!

pregnancy week-by -week calculator by due date

First day of your last menstrual period
Cycle Length
Please, Enter all values correctly.
Gestational age
Estimated Due Date
Until Due Date
Trimester-I Trimester-II Trimester-III


How many weeks am I and why is it important?


Your weeks of pregnancy help determine blood tests, ultrasound tests, and more importantly when you can expect the birth of your baby.

They also help you to identify some situations in order to learn what is normal and when to do procedures. What’s normal at 26 weeks might not be normal at 32 weeks. In addition, tests to be performed at 20 weeks but at 16 weeks could be misinterpreted.

How can I calculate important week-by-week information throughout my pregnancy?

This week-by-week pregnancy calculator helps you find out exactly how many weeks you’re pregnant right now, details the development of your baby, and exactly what’s going on with your body right now. Only enter your date of pregnancy or other data to build and measure a customized weekly and daily calendar of pregnancy.

The “Pregnancyvitamins” Monthly Pregnancy Calculator and Calendar is a week-by-week pregnancy calculator and calendar with information for each day of your pregnancy.

Don’t know your due date?  Use our Pregnancy week-by-week Calculator to find out the exact due date, with dates for exciting pregnancy events!


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Sharon Olabanji
Sharon Marie olabanji RN, CHO, Founder and CEO of Pregnancyvitamins, has a background in community health, nursing, and nutrition. As a mom of two, I do thorough research and I decide to take good care of my self and tackle health problems during pregnancy and after delivery. is the culmination of her thousands of hours of research and all posts are medically reviewed and verified by the research team.

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