Trimester Calculator
Enter your due date to see the exact date range of each trimester.
Your Pregnancy Timeline
You're in your third trimester · 40 weeks 0 days
1st Trimester
From Nov 13 to Feb 11
2nd Trimester
From Feb 12 to May 27
3rd Trimester
From May 28 to Aug 20
Trimester 1
First trimester
Weeks 1–13
Thursday, November 13, 2025
to
Wednesday, February 11, 2026
Trimester 2
Second trimester
Weeks 14–27
Thursday, February 12, 2026
to
Wednesday, May 27, 2026
Trimester 3
Third trimester
Weeks 28–40
Thursday, May 28, 2026
to
Thursday, August 20, 2026
This is an estimate for information only — only about 1 in 20 babies arrive on their due date. Always confirm dates with your midwife or doctor.
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