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Pregnancy Calculator

Pregnancy Due Date Calculator

Find your estimated due date, see exactly how many weeks pregnant you are today, and track every milestone of your pregnancy. Just enter the first day of your last period.

Enter your details

Choose a date below — your result appears instantly.

Calculate from

Tap to pick the date your last period started.

2028 (average)45

Not sure? Most cycles are 28 days — just leave it as the average.

For IVF, use your embryo-transfer or egg-retrieval date.

Pregnancy is counted from the first day of your last period — about two weeks before conception. Your dates stay private on your device.

Your pregnancy milestones

How the pregnancy due date calculator works

Your estimated due date (EDD) is the date you are likely to give birth — around 40 weeks from the first day of your last menstrual period (LMP). This calculator uses Naegele's rule, the same method used in antenatal clinics: it counts 280 days forward from your LMP and fine-tunes the result for your own cycle length. Prefer to count from conception? Switch the calculator and it counts 266 days instead.

How many weeks pregnant am I?

Pregnancy is measured in weeks of gestation, starting from your last period — not from conception. That is why you are considered "2 weeks pregnant" at the moment of conception. The calculator shows your current week and day, your trimester and how far along you are, so you always know what stage you have reached.

The three trimesters

  • First trimester (weeks 1–13): organs form, early scans and folic acid matter most.
  • Second trimester (weeks 14–27): the anatomy scan (around week 20) and steady growth.
  • Third trimester (weeks 28–40): rapid growth and preparation for delivery.

Remember, a due date is an estimate — a healthy baby can arrive any time between 37 and 42 weeks. For an accurate, scan-confirmed due date and complete antenatal care, book an appointment with Dr. Abeera Ali, or read more about pregnancy & antenatal care.

Frequently asked questions

The calculator uses Naegele's rule — the standard clinical method. It adds 280 days (40 weeks) to the first day of your last menstrual period (LMP), then adjusts for your average cycle length. If you calculate from your conception or ovulation date instead, it adds 266 days.

It is a reliable estimate, but only about 1 in 20 babies arrive on the exact due date. A normal, full-term delivery can happen any time between 37 and 42 weeks. An early-pregnancy (dating) ultrasound is the most accurate way to confirm your due date — Dr. Abeera Ali can arrange this for you.

Use the cycle-length slider to enter your average cycle. Longer cycles usually mean later ovulation, which pushes the due date slightly later; shorter cycles bring it earlier. The calculator adjusts automatically.

Yes — switch the calculator to "Conception date" and enter the day of conception, ovulation or egg retrieval. For IVF in particular, your fertility specialist's dating is the most precise; this tool gives a close estimate.

As soon as you have a positive pregnancy test. The first antenatal (booking) visit is ideally before 12 weeks, so early scans, blood tests and folic-acid advice are all on time. You can book with Dr. Abeera Ali online or on WhatsApp.

Medical disclaimer: This calculator gives general estimates based on average cycles and standard guidelines — it is not a medical diagnosis. Every body and every pregnancy is different, so for an accurate assessment and advice tailored to you, please consult Dr. Abeera Ali.

Keep planning your pregnancy

Expecting? Start your antenatal care early.

Book a pregnancy consultation with Dr. Abeera Ali for a scan-confirmed due date and a healthy pregnancy plan.

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