Find out when your baby is due. Enter the first day of your last period or your conception date to calculate your estimated due date and pregnancy timeline.
The calculator uses Naegele's rule, which is the standard method used by healthcare providers. It estimates your due date as 280 days (40 weeks) from the first day of your last menstrual period. Only about 5% of babies are born on their exact due date.
Yes! If you know your exact conception date, select 'Conception Date' mode. The calculator will add 266 days (38 weeks) to estimate your due date, as this is the average gestation from conception to birth.
Gender can typically be determined by ultrasound around 16-20 weeks. However, using our expert Ramzi, Nub, or Skull theory analysis, you can get a prediction as early as 6-14 weeks from your ultrasound images.
Our free due date calculator uses Naegele's rule, the same method used by obstetricians and midwives worldwide. If you enter the first day of your last menstrual period (LMP), the calculator adds 280 days (40 weeks) to estimate your due date. If you know your conception date, it adds 266 days (38 weeks) instead.
Only about 5% of babies arrive on their exact due date, but it gives your healthcare team a reliable target window. Most births happen within two weeks before or after the estimated date.
Your baby develops all major organs. The heart begins beating around week 6. This is when early gender prediction using Ramzi theory becomes possible from your ultrasound.
Your baby grows rapidly and begins moving. At 12-14 weeks, Nub theory analysis can predict gender from the nub angle visible on ultrasound.
Your baby gains weight and matures. The 20-week anatomy scan often reveals gender. Skull theory analysis can also be performed from this point.
If you have regular periods, use your last menstrual period (LMP) — it's the standard medical method. If you tracked ovulation with OPKs or temping, use your conception date for a more precise estimate. IVF patients should use the transfer date (subtract 3 days for a 3-day transfer).
Ready to find out? Upload your ultrasound and our experts will analyze it using all three theories.
The Due Date Calculator is provided for informational and entertainment purposes only. Results are not a substitute for professional medical advice, diagnosis, or treatment. Always consult your doctor or qualified healthcare provider with any questions regarding a medical condition.
Do not make health or medical decisions based on these results. Read our full medical disclaimer.
Upload your ultrasound and our experts will analyze it using Ramzi, Nub, and Skull theories. Get a detailed prediction report.
