Pregnancy Due Date Calculator
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Due in January 2027

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

MilestoneDue Jan 1Due Jan 31
First day of last periodOr the equivalent date for a cycle other than 28 days.Mar 27, 2026Apr 26, 2026
Estimated conceptionAround 2 weeks 0 days.Apr 10, 2026May 10, 2026
Most accurate ultrasound dating ends13 weeks 6 days.Jul 2, 2026Aug 1, 2026
Second trimester begins14 weeks 0 days.Jul 3, 2026Aug 2, 2026
Third trimester begins28 weeks 0 days.Oct 9, 2026Nov 8, 2026
Early term begins37 weeks 0 days.Dec 11, 2026Jan 10, 2027
Full term begins39 weeks 0 days.Dec 25, 2026Jan 24, 2027
Late term ends41 weeks 6 days.Jan 14, 2027Feb 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 January due date, from the start to the end of each month.

  1. March 20260 weeks1st trimester
  2. April 20260–4 weeks1st trimester
  3. May 20260–9 weeks1st trimester
  4. June 20265–13 weeks1st trimester
  5. July 20269–18 weeks1st to 2nd trimester
  6. August 202613–22 weeks1st to 2nd trimester
  7. September 202618–26 weeks2nd trimester
  8. October 202622–31 weeks2nd to 3rd trimester
  9. November 202627–35 weeks2nd to 3rd trimester
  10. December 202631–39 weeks3rd trimester
  11. January 202735–41 weeks3rd trimester
  12. February 202740–41 weeks3rd trimester

A January due date is a window, not a deadline

Full term starts at 39 weeks, so for a January 2027 due date it begins as early as December 25, 2026. Late term runs until 41 weeks 6 days, as late as February 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 January baby may well arrive in December or February.

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.