Pregnancy Due Date Calculator
Find out when your baby is due based on your last period, conception date, or IVF transfer date.
How is your due date calculated?
The most common method adds 280 days (40 weeks) to the first day of your last menstrual period (LMP). This assumes a typical 28-day cycle with ovulation around day 14.
Can my due date change?
Yes. Early ultrasound measurements are the most accurate way to date a pregnancy. Your provider may adjust your due date based on the first trimester ultrasound.
What if I conceived through IVF?
IVF due dates are calculated from the embryo transfer date. Add 263 days for a day-3 embryo or 261 days for a day-5 embryo.
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