Due Date Calculator

You’re pregnant! Is your baby due soon? Use this pregnancy calculator to find out what day your baby will be born. Enter the date of the first day of your last menstrual period (LMP):



Enter the date of the first day of your last menstrual period (LMP):



Probable date of conception:


Foetal Age Today:


Best date range for NT scan:


(12 weeks 3 days to 13 weeks 3 days)

Morphology Scan Date:


(19 weeks)

First Heart Tones by Doppler:


(11 to 12 weeks)

Best time to evaluate cervical length in patient with risk factors:


Best time for routine anatomy ultrasound:


(18 to 20 weeks)

Estimated Due Date:



3 techniques to calculate
the due date

For a more precise estimation of your due date, it’s beneficial to know the exact date of conception. By adding 266 days to your conception date, you can approximate when your baby is expected. However, determining the exact conception date can be challenging, as factors like implantation timing may influence the accuracy of the calculation. Consulting with your healthcare provider can help refine the estimate based on your individual circumstances and medical history.

Calculating an IVF due date based on the transfer date is straightforward. First, identify the transfer date, which marks the moment the embryo(s) were placed into the uterus. Next, add 266 days to this transfer date, as pregnancies typically span around 38 weeks. Finally, consider any adjustments needed based on the type of embryo transferred; for instance, if it was a 3-day embryo, subtract 3 days from the estimated due date to align with its developmental stage at transfer.

Using an ultrasound scan provides the most precise estimation, particularly during the first trimester of pregnancy. This method involves a medical ultrasound where your baby’s crown-rump length is measured, offering a reliable due date calculation. However, it necessitates a medical appointment and depends on the quality of the ultrasound equipment utilized for accurate results.

The start of your
pregnancy journey

Once you calculate the date, you may know when to expect the little baby and plan accordingly.

If you didn’t take the above steps on calculating the date, fix an appointment with your doctor. The practitioner will carry out pregnancy tests and other physical exams to establish the due date.

During each visit, the practitioner will examine your uterus size.
Plus, the development of the unborn will be monitored. Signs such as hearing your baby’s first heartbeat or seeing the unborn in ultrasound can be a thrilling scene. Depending on the observations, the due date might be adjusted.

While the doctor will advise you the best, you can do many other chores when you get pregnant. Explore our due date calculator and the rest of the website to find out more.

More articles for mothers