Pregnancy Due Date Calculator

Easy Pregnancy Calculator to Work Out Your Due Date

Have you just found out you’re pregnant? Massive congratulations! Calculating your due date can sometimes feel overwhelming, but with our pregnancy calculator, you can quickly determine when to expect your bundle of joy. Simply input your details, and our calculator will help you pinpoint the day your baby is likely to arrive.

How Do You Calculate Your Baby’s Due Date?

Typically, a pregnancy lasts about 40 weeks (or up to 42 weeks). Remember, this calculation starts from the first day of your last period—not from the day you missed your period. This means that by the time you take a pregnancy test on your missed period, you’re already approximately four weeks pregnant.

Understanding Gestational Age: How Many Weeks Pregnant Am I?

Figuring out how many weeks pregnant you are can be confusing. Healthcare professionals calculate gestational age starting from the first day of your last period. For instance, while your doctor might say you’re four weeks pregnant, your baby’s actual developmental age is closer to two weeks. This crucial detail helps you better understand your pregnancy timeline.

Will My Baby Be Born on My Due Date?

It’s important not to stress about the exact due date. For most pregnancies, the estimated due date serves only as a guideline. Without the precise timing of fertilization, the actual birth date can vary. Studies show that only about 5% of babies are born exactly on their due date.

How Far Can You Pass Your Due Date?

While the due date offers a helpful estimate, most babies arrive within a window of two weeks before or after the predicted date. Remember, the due date is not a guaranteed arrival date—it’s simply an average estimate.

Will My Due Date Change with a Dating Scan?

Yes, your due date might be adjusted after your first dating scan, usually performed between 10-14 weeks. This ultrasound provides a more accurate measure of your baby’s gestational age based on their size and development, ensuring your due date is as precise as possible.

Can I Plan My Due Date?

Planning your exact due date is nearly impossible without fertility treatment. Although many dream of a summer baby or a Christmas baby, natural pregnancy timing is unpredictable. Even if you conceive in your desired month, only a small percentage of babies are born precisely on their due date.

Alternative Ways to Work Out Your Pregnancy Due Date

Another method to estimate your pregnancy due date is by calculating your menstrual cycle length. Count from the first day of your last normal period until the day before your next period begins—typically a 28-day cycle. Then, add 7 days to the first day of your last period and follow with an addition of nine months to estimate your due month. Although this method can provide a rough estimate, our pregnancy due date calculator remains the most reliable tool for accurate results.