Estimate a pregnancy due date using last menstrual period, conception date, IVF transfer date, or ultrasound dating. This calculator also shows estimated pregnancy weeks, trimester, and key pregnancy date milestones.
Last menstrual period:
This method estimates the due date by adding 280 days to the first day of the last period, adjusted for cycle length.
Conception date:
This method estimates the due date by adding 266 days to the conception date.
IVF transfer:
For IVF, the calculator estimates based on embryo transfer date and embryo age.
Ultrasound dating:
This method uses the ultrasound date and measured gestational age to estimate the due date.
A due date calculator can help estimate pregnancy timing, pregnancy weeks, trimester, and approximate pregnancy milestones. It is useful for planning appointments, tracking weeks, and understanding estimated timing.
Due dates are estimates. Always follow guidance from a qualified healthcare professional for pregnancy care and medical decisions.
Your result shows an estimated due date, estimated pregnancy week, trimester, days until due date, estimated conception date, and common pregnancy milestones. These results are for general planning only.
A due date calculator estimates a pregnancy due date based on last menstrual period, conception date, IVF transfer date, or ultrasound dating.
No. A due date is an estimate. Actual delivery can happen before or after the estimated due date.
Cycle length can affect ovulation timing, so a longer or shorter cycle may shift an LMP-based due date estimate.
No. This calculator is for general information only. Use your healthcare provider’s guidance for pregnancy dating and care.