Health
🤰 Pregnancy Due Date Calculator
Estimate your due date from last period or conception date using Naegele's rule.
🤰 Naegele's Rule
From LMP
LMP + 280 days
Standard obstetric calculation
From conception
Conception + 266 days
If ovulation date known
~5% of babies arrive on the exact due date. Most are born within 2 weeks either side. First-trimester ultrasound is most accurate.
📅 Milestones
1st trimesterWeeks 1–12
2nd trimesterWeeks 13–27
3rd trimesterWeeks 28–40
Full term37–42 weeks
💡 Timeline
- ✓First scan at 8–14 weeks
- ✓Morning sickness peaks 8–10 weeks
- ✓Anatomy scan at 18–22 weeks
- ✓Kick counting from 28 weeks
- ✓Hospital bag by 36 weeks
📎 Also Try
How Accurate?
Only ~5% arrive on the due date, but 80% within 2 weeks. First-trimester ultrasound is accurate to ±5 days.
Disclaimer
This is an estimate. Your due date should be confirmed by your healthcare provider with an early ultrasound.