Due Date
Calculator
Your due date is the estimated date when a baby is expected to be born.
Select a Date to Calculate Your Due Date & Pregnancy Week
Please select a date to continue.
FAQs
Select the day-3 or day-5 IVF transfer option and enter the embryo transfer date. The calculator adds 263 days for a day-3 transfer or 261 days for a day-5 transfer. Your fertility clinic can confirm the date used for your care.
Choose the date you know: the first day of your last period, an approximate conception date, or a day-3 or day-5 IVF transfer date. The calculator uses 280 days from the first day of your last period or the corresponding offset for the other methods. Your healthcare professional can confirm the best date for your pregnancy.
No. A due date is an estimate, and only about 1 in 20 people give birth on that exact date. Your healthcare professional uses it as a guide for tracking your pregnancy.
A last-period estimate assumes a regular 28-day cycle, so it may be less reliable when your cycle varies or the date is uncertain. If you know an approximate conception date, you can select that option. Ask your healthcare professional about dating with an early ultrasound.
Pregnancy weeks are conventionally counted from the first day of the last menstrual period, about two weeks before conception in a typical 28-day cycle. When you choose conception or IVF, the calculator converts that date to an equivalent pregnancy-week starting point.
