Cubestack

Pregnancy Due Date Calculator

Free due date calculator — find your baby's estimated due date, how many weeks pregnant you are, and key pregnancy milestones, from your last period, conception or IVF transfer date.

days
2140

Estimated due date

Sun, 30 May 2027

You are 10 weeks pregnant · trimester 1

210 days to go

  • End of first trimesterSun, 15 November 2026
  • Anatomy scan (around 18–22 weeks)Sun, 10 January 2027
  • Viability milestoneSun, 7 February 2027
  • Third trimester beginsSun, 7 March 2027
  • Full term beginsSun, 9 May 2027
  • Due dateSun, 30 May 2027

Only about 1 in 25 babies arrive on the due date; most come within two weeks either side. Your doctor may adjust it after an ultrasound. Not medical advice.

What is the Pregnancy Due Date Calculator?

A due date is estimated as 40 weeks (280 days) from the first day of the last menstrual period — Naegele's rule — adjusted for cycle length. Doctors often refine it with an early ultrasound.

How to use it

  1. 1

    Choose a method

    Last period is the most common.

  2. 2

    Enter the date

    And your usual cycle length.

  3. 3

    See your due date

    With weeks pregnant and milestones.

Features

  • Three methods

    Last period, conception date or IVF transfer (day 3 or day 5).

  • Weeks pregnant

    Today's gestational age and trimester.

  • Milestones

    Dates for the end of each trimester, the anatomy scan and full term.

Popular uses

  • Expecting parents

    Plan appointments and leave.

  • Family and friends

    Know when to expect the baby.

Frequently asked questions

How accurate is a due date?

Only about 4% of babies arrive on it; most are born within two weeks either side.

Does cycle length matter?

Yes — longer cycles usually mean a later due date, so enter your usual length.

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