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Due Date Calculator

Estimate your pregnancy due date from your last menstrual period or conception date, with your current progress, trimester, and milestone dates.

How to use Due Date Calculator

  1. Choose LMP or conception as the method.
  2. Enter the date (and cycle length for LMP).
  3. See your estimated due date and progress.

Frequently asked questions

How accurate is a due date?
Only about 1 in 20 babies arrive exactly on the due date; most arrive within about ten days either side. It is an estimate, not medical advice.

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