Due Date Calculator

Due Date Calculator

Do you want to know your due date? Just type in few details in our due date calculator to find out! If you want to know how your baby develops each month, check out Month by Month Pregnancy Guide.

Fill in your Last Menstrual Period (LMP) date below


Due Date Calculator – How to use it?

due date calculator and how to use it

Do you want to find out your due date? Use our due date calculator to find out when your baby is due. All you need to find out is the last date of your menstrual cycle, which you fill in our calculator.

The due date calculator will not only tell you when your baby will be due but also basic information about the stage of pregnancy you’re in, the star sign the baby will be born into, the likely conception date, the date when you are most likely going to feel the first moves of the baby or be able to hear the heartbeat.

It will also give you the time frame for your first and second trimester and list the basic facts about the stage of pregnancy you’re in – you will find out what organs and functions in the baby are developing at that stage and what symptoms you can experience.

The most comprehensive due date calculator is right here. Just remember, to get accurate results, put the last date of your period in our due date calculator to get accurate results.

A Bit of History on Calculating the Due Date

due date calculator history

Has your mind ever wondered how women in the past predicted when they’re going to pop that bun out of the oven without a due date calculator? I can hear your mind going, “Huh. Didn’t think of that.”

It’s certainly piqued my curiosity because there has to be some way (although probably inaccurate) women have counted the months in the past. As a matter of fact, many civilizations in the past have failed to confirm pregnancy up until their baby bump starts to show.

In the past, women have been confirmed to be carrying in several very historical ways. In 1350 BC, Egyptians confirm pregnancy by having suspected pregnant women urinate on wheat and barley seeds over the course of several days. If they sprout, then the woman is pregnant. The Egyptian civilization was one of the first to have a so-called method of distinguishing the gender of the baby even before it was born. It was also through the barley and wheat test. If the wheat sprouted, it would be a girl and then a boy if the barley sprouted. It was a couple of thousand years later that the ancient Egyptian method of confirming pregnancy was proven to work. They didn’t have a close to accurate pregnancy test kit like we do now let alone a due date calculator.

How does a due date calculator work?

Franz Karl Naegele
Franz Karl Naegele (1778 – 1851) is remembered for “Naegele’s rule”, a standard method of calculating the due date for a pregnancy.

Let’s take a look at how our ancestors counted them. It has been established that in the medieval times, a woman is suspected to be with child if she was sexually active and have missed her regular dates of bleeding. They approximated that the baby is due to come out after missing the tenth month of the menstrual period. They didn’t have calendars before so they used the moon’s phases to count the months that go by.

Our ancestors have already figured out how to use the moon to predict planting seasons and plan religious events. And then based on their observations of the moon and its phase, they’ve concluded due dates on the tenth time they see the same phase from when they suspect the pregnancy which is also what they call ‘Ten Moons’. The lunar method of a due date calculator is pretty much accurate. There are 28 days in a bleeding cycle on the average. There are also 28 days for the moon to complete its phasing cycle. Women bleed usually during the full moon. 280 days is the average number of days of a full term pregnancy which is also the same number of days for ten moon phases, which is also exactly 40 weeks. And although not entirely accurate, women who live in countries that have for seasons also used these weather changes to estimate. For instance, if a woman thinks she has conceived during the winter, she would expect to give birth sometime in the fall.

Later in time, roughly about the early 1800’s, a German obstetrician named Franz Naegele invented the Naegele’s Rule. This became the standard due date calculator and it follows a simple formula. The formula identifies the estimated delivery date from the first day of the woman’s LMP (last menstrual period) by adding one year, deducting three months and adding another seven days. The result will be approximately 40 weeks or 280 days which confirms the ‘ten moons’ of the olden days. But if you’re as bad at math as I am, we have our very own due date calculator here. It will tell you your EDD, suggest the best date for ultrasounds and a lot of other helpful information that you might need.

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