My Pregnancy Guide
My Pregnancy Guide My Preconception My Pregnancy My Motherhood Pregnancy Tools & Stuff Pregnancy Shopping

Pregnancy Calculator

One of the most confusing parts of your pregnancy may be understanding exactly where you are when it comes to weeks and months of gestation. Ask any expectant mother how far along she is and you may find yourself receiving a rather convoluted answer…” I’m in my second month? Or starting my third??” “ Twenty-two…no, twenty-four weeks??” Don’t join the ranks of women perplexed about their own pregnancy. The best way to feel in control is to educate yourself about the way gestation is calculated and use that information to help stay informed about the changes going on inside of you.

It may be tempting to date your pregnancy based on the day of conception as it only makes sense. The first day of your pregnancy begins when the egg is fertilized right? Wrong! Doctors and scientists agree that the first day of your pregnancy is technically the first day of your last period. Even though your baby doesn’t even exist yet, the two weeks before you ovulate are counted as an important part of your pregnancy. These weeks are just as relevant as the rest of your gestation period as it is during that time that your body begins the complicated preparation for pregnancy. Even though the baby is technically absent, this is the time when your hormones, uterus and ovaries get ready for conception and are therefore these weeks are crucial for your future baby’s development.

Keeping track of your pregnancy accurately is an important way to stay confident and informed during your nine month journey. It’s impossible to peer into your uterus to see the amazing changes that are taking place. However, knowing what week you’re in and learning about everything that’s happening to your mind, body and baby is an excellent substitute! Read on to understand where you are in your pregnancy journey and get all the information you’ll need to enjoy all the fascinating tasks your body is taking on!

When was the first day of your last menstrual period?

Number of days 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):
Number of weeks you have been pregnant for:
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?
The number of weeks:
Calculated date:
Given the birthday or due date, calculate likely conception date
Calculated conception date:

Find Your Baby's Name
Free Pregnancy and Baby Website