Are you excited about knowing your due date?

Our easy pregnancy calculator is the number one most popular way to calculate your due date based on the date of your last menstrual period. Check out this amazing tool below. Remember, this is only an estimation as your little star can come any day; two weeks before or after your scan date.

You were predestined by God for greatness
Home » Pregnancy Calculator

Helping Moms to Succeed in the Best Outcomes The First Time!

Congratulations on your pregnancy! I AM SO HAPPY FOR YOU! You probably are between wondering if you are pregnant as you just missed your monthly period, feeling the mild symptoms of morning sickness maybe even showing off the pregnancy glow. Now that all of this has happened, you can start planning for the arrival of your little miracle today.

I know that explaining this fact is sometimes hard to understand, but I’ll do my best to help you. When is your baby due? Use this pregnancy calculator to find your due date based on the date of your last menstrual period, conception date, IVF 3-day or 5-day transfer date or date of your last ultrasound.

Pregnancy Calculator

Due Date, Conception Date Calculation Results:


What Factors Go Into Determining Your Due Date?

Factor # 1 Your last menstrual period

Our due date calculator allows you to choose between two ways for calculating when your baby will arrive: the date of your last menstrual cycle or the day of your conception, often known as ovulation.
Take a peek at how each of these strategies works in the video below.

The most common way for calculating your due date is to use the first day of your previous menstrual cycle. Why?

Pregnancies last on average 40 weeks, or 280 days. You can find out when your baby is due by:

  • Take out your calendar.
  • Find the first day of your last period on the calendar.
  • Add 40 weeks (or 280 days) to the end of the year.
  • You can also add one year and seven days to the date of your last period by counting back three calendar months from the first day of your last period. Easy, peezy right?

The most frequent method is to use the first day of your last menstrual cycle.

Factor #2 Conception Date:

If you’ve been keeping track of your cycle, you may know your ovulation date and can use that to predict your due date. This is the time during your menstrual cycle when a mature egg leaves your ovary in the hopes of being fertilized within the next 12 to 24 hours. The egg melts if fertilization does not occur within this time frame.

Your anticipated due date can be calculated using the date of conception, which is effectively the date you ovulated. Because ovulation occurs on day 14 of a 28-day menstrual cycle, multiplying your conception date by 266 days will give you your baby’s due date.

Your Doctor Can Use These Methods to Calculate Your Due Date
Aside from the methods used in this pregnancy calculator, you can also find out your due date by having an ultrasound scan performed by your doctor. or by using the date of your IVF transfer (for our IVF mamas-to-be).

Factor # 3 Date of IVF Transfer

Diagram Of A Human Uterus During The Seventh Week Of Pregnancy. (Photo By Encyclopaedia Britannica/UIG Via Getty Images)

If you’re one of the 33% of Americans who have used fertility treatments, such as IVF, to conceive or know someone who has, your doctor can simply predict your due date by utilizing your expected IVF transfer date (i.e. the day your fertilized eggs were implanted onto your uterine wall).

Here is how this amazing miracle works:

If your embryo transfer occurred on the third day of embryo growth, your doctor can determine your pregnancy due date by adding 263 days to your IVF transfer date.
If you chose to have your embryo transfer on day 5 of embryo development, your doctor can determine your due date by adding 261 days to the transfer date.

Factor # 4 Scan with Ultrasound

Don’t worry if keeping track of dates and schedules isn’t your strong suit. You can still get an ultrasound scan at your doctor’s clinic to figure out your anticipated due date. If your menstrual cycle does not follow a predictable pattern, this method can provide a more precise estimate.

This loss in accuracy is related to the fact that after roughly 8 weeks, fetuses develop at dramatically variable rates. An ultrasound technician can measure the length of your baby’s crown-rump length and other biometric characteristics during an early ultrasound (which normally takes place between weeks 6 and 8 of your pregnancy) to predict your baby’s gestational age within 5 to 7 days of accuracy. Your doctor can then predict your baby’s due date based on the expected gestational age.

While your doctor can take measurements throughout your second trimester to estimate the gestational age of your baby (and thus your due date), these calculations are less precise. In fact, measurements of gestational age taken between weeks 14 and 21 of pregnancy have a high degree of accuracy between 7 -10 days ( as opposed to 5-7 days early pregnancy ultrasounds). A reminder is the fact that foetuses development differ after eight weeks. Do you want to know more about scanning during pregnancy? Link here.

Is it possible the my due date can change?

Remember scanning is only as good as the the professional doing it so things can change

Your doctor may adjust your due date based on what they see during routine ultrasounds in the first and second trimesters. Your due date, for example, may alter if:

Based on baby’s projected age, your infant is notably smaller or larger than “the norm.”
The fundal height (the size of the uterus) does not correspond to typical growth charts.
Your due date and your alpha-fetoprotein (AFP) levels—a protein generated by your growing baby that grows and lowers during specific weeks of pregnancy/strong>—differ. (For example, if your doctor says you’re 16 weeks along but your AFP levels don’t match what’s expected at that point, it’s possible your pregnancy was misdated.)

Your due date was calculated using your most recent menstrual period, but you have a history of irregular menstrual periods.
Your doctor is unlikely to adjust your due date after the second trimester. The most reliable estimates are made during the third trimester test. Because fetal development rates vary greatly after the first trimester, due date estimates during the third trimester can be wrong by as much as 21 to 30 days. In the third trimester, many doctors may prescribe ultrasounds to check the baby’s growth and position, even if they are low-risk.

Estimated Due Date Accuracy

Only a small percentage of pregnancies are delivered on their due dates. After all, we’re talking about the birth of a unique human existence, whose chronology is easily influenced by a variety of factors. We can only use dates and milestones based on averages and projections to track a baby’s progress.

Take a look at some of the reasons why due date estimates are, well, estimates for a better grasp of due date accuracy.

The ‘last menstrual period’ calculation is based on a 28-day menstrual cycle, with ovulation 14 days into the cycle. Discrepancies can occur because this does not account for cycle length abnormalities and ovulation time variability.
The progression of human life is predetermined by God who created it. Psalms 139: 1- 17 . God knows everything about us.

Chances of Having a Baby on Your Due Date?

So, what are the chances that the day you penciled in on your calendar this year will be the same as the date you celebrate with your child every year?

According to the Centers for Disease Control and Prevention, 57.5 percent of documented deliveries occur between weeks 39 and 40 of pregnancy. This indicates that each day, including your anticipated due date, has a 4 to 5% chance of being the actual delivery date throughout this interval.

The following is an overview of when you’re most likely to have your baby:

  • 10% of the time before 37 weeks
  • Between weeks 37 and 38, there was a 26% increase.
  • Between weeks 39 and 40, 57.5 percent increased.
  • In week 41, there was a 6% increase.
  • After 41 weeks, less than 1% of people are still alive.

Factors that influence whether a baby is born early or late

While the majority of women give birth between 39 and 40 weeks, a surprising proportion of pregnancies happen before that. Why?

The specific reasons for early delivery are frequently unknown. However, there are several risk considerations to consider:

  • Twins or multiple babies in the womb
  • During pregnancy, doing drugs, smoking, or drinking alcohol is not a good idea.
  • Infections affecting the cervix or uterus, such as a urinary tract infection
  • Polyhydramnios is a type of polyhydramniosis (a condition of excess amniotic fluid)
  • Preterm births have been a problem in the past.
  • Surprisingly, if you’re a first-time mother, you might have to wait a bit longer for your kid to arrive. According to studies, first-time mothers are more likely to give birth after their expected due dates.
  • Being pregnant with a male
  • A history of post-term pregnancies — This could reflect a woman’s genetic inclination to carry a kid for a longer period of time than usual.
  • A BMI of more than 30 — While the specific links between high BMIs and preterm deliveries are unknown, experts think it is linked to an increased risk of certain health issues (such as diabetes) that affect hormone levels.

You Calculated Your Pregnancy Using the Pregnancy Calculator… So, what’s next?

Preparation is key for this wonderful journey!

It is now time to begin planning. It’s never too late to arrange your life, educate yourself on what to anticipate, and prepare for the new addition to your family, whether you’re in your first or third trimester.

  • Set up an appointment with your doctor or midwife to begin monitoring you to ensure a safe pregnancy after the initial rush of learning you’re expecting. Did you know that you can find out the gender of your baby as early as six weeks? Mama, yes! It’s called Find out the gender of your baby – As early as 6 weeks after conception.
    You’ll have more time to ponder about baby names.
    You can have a baby shower or a gender reveal party.
  • Early Gender DNA Test allows mothers to discover their baby’s gender.


We have reached the end of this presentation. I hope you were able to understand what is happening and what is next. I was always excited about when attending my antenatal first attendance to determine with my provider the estimated date of delivery. Remember, you can have your little star two weeks before or after the worked out date. Would like for you to check out my mini prenatal workshop here –How to Super Charge Your Prenatal Care for Maximum Results! Please share a comment below and let us know how helpful the information has been. I look forward to you coming again.

Marilyn with lots of love 💓

” I found using this calculator is pretty good! I highly recommend you to give it a try.”

Joanna from California


Hi, I’m Marilyn

I have worked with thousands of pregnant families and have helped them to have a wonderful birth experience. I would like to do the same for you. register for one of our phenomenal classes here.

Latest Posts

How to do A pregnancy announcement your family will love!

How to do A pregnancy announcement your family will love!

Pregnancy announcements are a special time for families. It is not just about the parents-to-be, but about the whole family. A pregnancannouncement should be an event that reflects the joy and excitement of the whole family. Pregnancy announcements can be tough to create! That’s why you can use our FREE to put yourself at ease,…



Hello and Welcome to Maternal Treasures Phenomenal Blog! I am delighted that you are here! Your home for expert information, empathetic advice, effective, and powerful recommendations for all things pregnancy, delivery, baby and safe motherhood Welcome to my Blog page; the heartbeat of Maternal Treasures and Mom. Here you will find links to all of…

Tips for newborn  safety the first few weeks: All Moms Need to Know!

Tips for newborn safety the first few weeks: All Moms Need to Know!

Even though baby safety is celebrated during the month of September, it must be also known that every day is a safety awareness day. New moms should be knowledgeable about what this safety is about for their newborn baby; especially if they are a first time mom. Today we are going to talk about some…

Why Pregnancy Classes Necessary? 10 Best Reasons Why Childbirth Classes Are Needed!

Why Pregnancy Classes Necessary? 10 Best Reasons Why Childbirth Classes Are Needed!

Introduction Are you worried about what your pending labor experience will be. Don’t you worry no more! Join our next session of childbirth or breastfeeding classes for an ultimate, phenomenal, birth experience. We’ve got you covered! Did you know Childbirth Classes Rock?Are Birthing Classes Necessary? 10 Best Reasons Why Childbirth Classes Are Worth It!I can tell you mama  Childbirth classes: are…

10Positive Affirmations for labor day

10Positive Affirmations for labor day

Being pregnant is a happy time! And astonish! and splendor! However, not every pregnant woman experiences these positive emotions throughout her pregnancy, and certainly not always. In reality, pregnancy can be extremely challenging for some women. Learning how to shift your thoughts not only during labor but also during everyday life when you encounter bad…

Leave a Reply

Your email address will not be published. Required fields are marked *