Oct 30, 2025 · Enter LMP, due date, or ultrasound to estimate your conception date and likely window. We also show a timeline of key pregnancy dates.

This calculator provides an estimated pregnancy schedule based on the due date, last period date, ultrasound date, conception date, or IVF transfer date.

Jun 6, 2025 · Our Conception Date Calculator uses your due date to estimate when you got pregnant. (If you don't know your due date yet, just head over to our Due Date Calculator.)

Our conception calculator, also known as a reverse due date calculator, is the answer to the question "When did I conceive?" as it estimates when your pregnancy was conceived.

This conception calculator will help you estimate the conception date of your child.

This conception calculator estimates conception date in case of an ongoing pregnancy or based on a date of birth.

Estimate when you conceived with our accurate conception date calculator. Calculate your conception date range from LMP, due date, or ultrasound data with medical precision. Our …