Free Pregnancy Calculator - Track Your Pregnancy
Calculate due date, current week, trimester, and key milestones. Complete pregnancy timeline from conception to birth.
Quick Answer
Pregnancy lasts 40 weeks from last menstrual period (LMP). Due date = LMP + 280 days. First trimester: weeks 1-12. Second: weeks 13-27. Third: weeks 28-40. Our calculator tracks all milestones.
Key Facts about Pregnancy Calculator:
- Pregnancy = 40 weeks from LMP
- Due date = LMP + 280 days
- Only 5% deliver on due date
- Full term: 39-40 weeks
- Three trimesters of ~13 weeks each
- Key milestones at specific weeks
Why Use Our Pregnancy Calculator?
Pregnancy tracking:
Due Date Calculator
Calculate expected delivery.
Week Tracker
Current pregnancy week.
Milestone Dates
Key appointment dates.
Timeline View
Full pregnancy overview.
Instant Results
Get timeline immediately.
Private
Your data stays secure.
How to Pregnancy Calculator in 3 Easy Steps
Track pregnancy:
Enter Date
LMP or known due date.
View Timeline
See current week and milestones.
Track Progress
Follow pregnancy development.
Why Use Our Calculator?
Complete timeline
Key milestones
Week-by-week tracking
Trimester info
Common Use Cases for Pregnancy Calculator
Perfect for:
Frequently Asked Questions
Everything you need to know about our pregnancy calculator
How is due date calculated?
LMP + 280 days = due date. Ultrasound may refine this estimate.
Due date = First day of last period + 280 days (40 weeks). This assumes 28-day cycle with ovulation on day 14. Ultrasound may adjust this.
How accurate is due date?
Only 5% deliver on due date. Most within 2 weeks of it.
Only about 5% of babies arrive on the due date. Most deliveries occur within 2 weeks before or after. Full term is 39-40 weeks.
Still have questions? Try the tool yourself!
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