Pregnancy Due Date Calculator
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Due in March 2027

If your estimated due date falls between March 1, 2027 and March 31, 2027, these are the date ranges your pregnancy shares with everyone due that month. Each range runs from a March 1 due date to a March 31 due date.

MilestoneDue Mar 1Due Mar 31
First day of last periodOr the equivalent date for a cycle other than 28 days.May 25, 2026Jun 24, 2026
Estimated conceptionAround 2 weeks 0 days.Jun 8, 2026Jul 8, 2026
Most accurate ultrasound dating ends13 weeks 6 days.Aug 30, 2026Sep 29, 2026
Second trimester begins14 weeks 0 days.Aug 31, 2026Sep 30, 2026
Third trimester begins28 weeks 0 days.Dec 7, 2026Jan 6, 2027
Early term begins37 weeks 0 days.Feb 8, 2027Mar 10, 2027
Full term begins39 weeks 0 days.Feb 22, 2027Mar 24, 2027
Late term ends41 weeks 6 days.Mar 14, 2027Apr 13, 2027

Dates follow ACOG’s trimester and term definitions.1,2 For your exact dates, use the calculator below.

How far along you’ll be, month by month

The range covers every March due date, from the start to the end of each month.

  1. May 20260 weeks1st trimester
  2. June 20260–5 weeks1st trimester
  3. July 20261–9 weeks1st trimester
  4. August 20265–14 weeks1st to 2nd trimester
  5. September 20269–18 weeks1st to 2nd trimester
  6. October 202614–22 weeks2nd trimester
  7. November 202618–27 weeks2nd trimester
  8. December 202622–31 weeks2nd to 3rd trimester
  9. January 202727–35 weeks2nd to 3rd trimester
  10. February 202731–39 weeks3rd trimester
  11. March 202735–41 weeks3rd trimester
  12. April 202740–41 weeks3rd trimester

A March due date is a window, not a deadline

Full term starts at 39 weeks, so for a March 2027 due date it begins as early as February 22, 2027. Late term runs until 41 weeks 6 days, as late as April 13, 2027.2 In an Australian study of births after spontaneous labor, only about 5% arrived on the estimated due date, and about two-thirds within a week of it.3 So a March baby may well arrive in February or April.

Your due date may also move once, after an early ultrasound.4 Read how accurate due dates are.

Find your exact dates

Enter the due date your care team gave you, or choose another method.

What do you know?

The day bleeding started, not the day it ended.

From the first day of one period to the first day of the next.

Calculated on your device. Your dates are never sent to us. Privacy

Sources

  1. How Your Fetus Grows During PregnancyAmerican College of Obstetricians and Gynecologists
  2. Committee Opinion No. 579: Definition of Term PregnancyAmerican College of Obstetricians and Gynecologists, 2013
  3. Predicting date of birth and examining the best time to date a pregnancyInternational Journal of Gynecology & Obstetrics 123(2):105–109, 2013
  4. Committee Opinion No. 700: Methods for Estimating the Due DateAmerican College of Obstetricians and Gynecologists, with AIUM and SMFM, 2017

Links checked November 12, 2026. Citing a source does not mean it endorses this site.