Pregnancy Calculator : How Many Weeks Am I Pregnant?

With your pregnancy week calculator;

  •  “How many weeks pregnant am I?” and “How old is my baby?” You can learn the answers to your questions,
  •  You can calculate the date of birth.

To use the gestational week calculator, select your last menstrual period (date) from the calendar below. Our pregnancy calculator by menstrual date will give you the most accurate result about the estimated due date and gestational week!

Calculate your baby's due date :

Last Menstrual Period :

Probable date of conception :

( about two weeks after last menstrual period )

Foetal Age Today :

Weeks Days

Best date range for NT scan :

( 12 wks 3 days to 13 wks 3 days )

19 Weeks / Morphology Scan Date :

Estimated Due Date (40 Weeks) :

On , you will be weeks days pregnant.

Previous Ultrasound Date and Foetal Age On That Day :

Weeks Days

The Pregnancy Calculator can estimate a pregnancy schedule based on the provided due date. An estimated due date, usually based on a sonogram, is typically obtained from a health care provider during a prenatal visit. It is also possible to estimate the due date based on the biological cycle using the Due Date Calculator. You can calculate the Pregnancy by using Multiple Criteria.

This calculator may be used to calculate the best date range to book a Nuchal Translucency Scan and Morphology Scan :

  1. NT scan may be performed between 11wks–13wks 6 days (CRL 45-84mm) however as individual babies grow slightly differently and to visualize the fetal bladder and heart the very best range is 12wks 3days to 13wks 3day
  2. A morphology scan is best booked after 19wks but before 22wks.

To use the calculator simply select one of the following
1. LMP
2. When ovulation & conception occurred
3. Age of fetus today
4. EDD

OR you may, in the bottom drop box of the calculator, enter the date of a previous ultrasound and fetal age at that scan if the patient's EDD was not reported. The dates on which you should book your scans will automatically be displayed. You can also find out how many weeks pregnant a patient will be on a particular date by selecting a date between the patient's LMP and EDD in the second last drop-down box after you have performed the initial calculations. Should you enter a date incorrectly or have a new calculation REFRESHING the web page will clear previous calculations.

Each Pregnancy Calculator report contains the following information:
1. Estimated Due date
2. Probable date of conception (about two weeks after the last menstrual period)
3. Foetal Age Today
4. Best date range for NT scan(12 wks 3 days to 13 wks 3 days)
5. 19 Weeks / Morphology Scan Date
6. Estimated Due Date (40 Weeks)
7. Approximate Pregnancy days in weeks
8. Previous Ultrasound Date and Foetal Age On That Day

The information provided by this calculator is not a diagnosis. The calculations that are provided are estimated based on averages and the EDD provided by the patient's healthcare provider is the best date to use. This site is not responsible for incorrect usage of this calculator or incorrect booking times based on information provided by this calculator.

How Many Weeks Does Pregnancy Last?

A normal pregnancy lasts an average of 40 weeks/9 months. However, your doctor will inform you of your pregnancy period on a weekly basis based on the date of your last menstrual period. Because the date you found out you were pregnant is not the date your pregnancy started. The important thing is the process in which fertilization begins. Detailed gestational week calculation is done according to this logic.

So, “What week will the birth take place?”, “When will I give birth?” Do you have questions like Let's answer you like this; Although we said that the pregnancy lasts for 40 weeks, the birth is 38-42. It is also normal for it to occur between weeks. Pregnancy terminated after 38 weeks is called preterm birth.

By the way, we have given you the concepts that you will hear frequently during your pregnancy with their meanings below.

Pregnancy Week (Menstrual Week): It starts on the first day of the last menstrual period, which takes place 2 weeks before conception. This is the week most doctors use to evaluate pregnancy. The average pregnancy period is 40 weeks.

Ovulation Week (Fertilization Week): The day of conception begins. Its average duration is 38 weeks.

Trimester: Each trimester lasts 13 weeks. There are 3 trimesters in a pregnancy.

Calendar Month: A pregnancy lasts an average of 10 calendar months. Calculating each month from 28 days, it equates to 280 days.

How Many Weeks Does Pregnancy Last?

How Many Weeks Am I Pregnant? How Many Months Am I Pregnant?Which Trimester?
How Many Months Is 1 - 4 Weeks Pregnancy? 1 Month1st Trimester
How Many Months Is 5 - 8 Weeks Pregnancy? 2 Months1st Trimester
How Many Months Is 9 - 13 Weeks Pregnancy?3 Months1st Trimester
How Many Months Is 14 - 17 Weeks Pregnancy? 4 Months 2nd Trimester
How Many Months Is 18 - 21 Weeks Pregnancy?5 Months2nd Trimester
How Many Months Is 22 - 26 Weeks Pregnancy?6 Months2nd Trimester
How Many Months Is 27 - 30 Weeks Pregnancy?7 Months3rd Trimester
How Many Months Is 31 - 35 Weeks Pregnancy?8 Months3rd Trimester
How Many Months Is 36 - 40 Weeks Pregnancy?9 Months3rd Trimester

How Many Months Am I Pregnant?

There will be many time definitions when creating a pregnancy calendar for yourself. We guess that one of the topics you are most curious about will be which month of pregnancy weeks coincide. Calculate automatically by referring to our pregnancy calculator above. You can also take a look at the image above to make the baby month calculation process easier. In this image, you can clearly see in which week, how many months your baby is and in which trimester of pregnancy.

How Many Months Am I Pregnant

How to Calculate the Week of Pregnancy?

As we mentioned, most women do not know the exact date of conception. Therefore, “How pregnant am I?” The question confuses them. In fact, the first day of the last menstrual period is considered the beginning of pregnancy. Therefore, pregnancy calculation is made according to the date of the last menstrual period. In other words, when your last menstrual period is subtracted from your current date and the result is divided by 7, it gives you your gestational week.

The pregnancy week calculator also works with this logic. You just don't have to do these things yourself. Pregnancy calculator with Calculator automatically gives results for you.

How to Calculate Birth?

“When will I give birth?” If the question is on your mind, there are 2 different methods for calculating the date of birth. One is to count 280 days, starting from the first day of the last menstrual period. The result is considered your probable date of birth. Another process is to go back 3 months from your menstrual date and add 7 days to the date you found. For example, if your last menstrual date is July 1, your estimated due date calculation result will be April 7.

How Reliable is Birth Calculation by Week of Gestation?

Is the result with the date of birth calculation methods safe? We know you're wondering about this. Few women give birth on the expected date. The proportion of these women is around 4%. Only 1 in 20 women will give birth on the date of pregnancy calculation. Therefore, when calculating the estimated birth, we recommend that you consider that you can give birth both 2-3 days before and 2-3 days after. That is, the calculation of the time of birth acts only on an estimate.

Think of this predicted result as a time to look forward to and complete your preparations! That way, if the baby isn't born at the estimated due date, you won't be nervous either. Because the baby's health condition or your health condition can affect the duration of pregnancy. So “When will the birth be?” It is very difficult to give a clear answer to the question.

Pregnancy Calculator | Smart Due Date Calculator

How to Calculate the Week of Pregnancy in Menstrual Irregularity?

For women with regular menstrual cycles, the pregnancy calculation method based on the last menstrual period gives good results. Since a normal pregnancy will last between 38-42 weeks, delivery also takes place within 2 weeks before or after the calculated date.

But if your menstrual cycle is irregular, this method may not work for you at all. Let's say you have a period every 6-7 weeks and you haven't seen it for 3 months. You took a test and found that you were pregnant. When could fertilization have taken place?

You will discuss this with your doctor, as a reliable due date estimate is important. Some data (other than your last menstrual period) can help you make this estimation. The first clue is the size of the uterus. This measure is measured and noted at the first doctor's control. It is expected to be compatible with the estimated stage of pregnancy.

The second tip is early ultrasound control. Some doctors routinely perform ultrasound exams, while others only do it for women with irregular periods, previous miscarriages, complicated pregnancies, and unpredictable due dates based on SAT and physical exams. Accordingly, data for pregnancy calculation can be obtained.

In the coming days, there will be developments that will reveal the estimated date of birth more precisely. Developments that will clarify the estimated date of birth

  1. The First hearing of fetal heartbeat (can be heard at 9 to 12 weeks on Doppler)
  2. Feeling the first jolt of life (weeks 16 to 22)
  3. Fundus height in examinations, that is, the top part of the uterus (For example, it reaches the level of the navel at around 20 weeks)

All of these tips are helpful, but none of them provide a definitive date. Only the baby determines exactly when the baby will be born. Of course, if you're going to give birth naturally!

With What Other Data Can Gestational Week Calculation Be Made?

Some special conditions such as menstrual irregularity may cause problems in creating a pregnancy calendar. In such cases, since the fertilization date is not determined clearly, a different pregnancy and estimated date of birth calculation formula should be applied.

The first of these is in vitro fertilization and other treatment methods in cases of infertility. In these applications, since fertilization is carried out in laboratory environments, the calculation of pregnancy according to the menstrual day may give incorrect results. For this reason, IVF pregnancy calculation can be made according to the date of embryo transfer, date of blastocyst transfer, and date of egg collection.

Apart from this, pregnancy calculations can be made according to the date of intercourse. However, this is not a reliable method as it is not known whether fertilization occurred immediately during the last intercourse.