Due Date Calculator

Calculate pregnancy due date and milestones

Pregnancy Information

Due Date Information

6/14/2026
Estimated Due Date
279 days to go
Current Progress0 weeks

Based on last menstrual period

Conception Date9/21/2025

Estimated date of conception

First Trimester Ends12/6/2025

Week 13

Second Trimester Ends3/6/2026

Week 26

Third Trimester Begins6/4/2026

Week 27 until birth

Pregnancy Timeline

Week 4
Implantation occurs
10/5/2025
Week 6
Heartbeat may be detected
10/19/2025
Week 8
All major organs forming
11/2/2025
Week 12
End of first trimester
11/30/2025
Week 16
May feel first movements
12/28/2025
Week 20
Anatomy scan ultrasound
1/25/2026
Week 24
Viability milestone
2/22/2026
Week 28
Third trimester begins
3/22/2026
Week 32
Baby's rapid growth period
4/19/2026
Week 36
Full term approaching
5/17/2026
Week 40
Expected delivery date
6/14/2026

Understanding Due Date Calculation

Naegele's Rule

The due date is calculated using Naegele's rule, which:

  • • Adds 280 days to LMP
  • • Adjusts for cycle length
  • • Assumes 14-day ovulation
  • • Estimates 40-week pregnancy

Important Notes

  • • Only 5% deliver on due date
  • • Normal range: 37-42 weeks
  • • Regular prenatal care is vital
  • • Dates may be adjusted by ultrasound

Pregnancy Stages

First Trimester

  • • Weeks 1-13
  • • Major organ development
  • • Morning sickness common
  • • Frequent prenatal visits

Second Trimester

  • • Weeks 14-26
  • • Baby movement felt
  • • Gender can be determined
  • • More energy typically

Third Trimester

  • • Weeks 27-40
  • • Rapid baby growth
  • • More frequent check-ups
  • • Birth preparation