Pregnancy Due Date Calculator
Pregnancy Due Date Calculator
Calculate your estimated due date using your last menstrual period or conception date.
Pregnancy Due Date Calculator FAQs
1. How is pregnancy due date calculated?
Pregnancy due date is commonly estimated by adding 280 days or 40 weeks to the first day of the last menstrual period.
2. Is the due date always accurate?
No. A due date is only an estimate. Only about 5% of babies are born exactly on their due date.
3. How long does pregnancy usually last?
Pregnancy is generally considered about 40 weeks from the first day of the last menstrual period.
4. What if I know my conception date?
When conception date is known, estimated due date is usually calculated by adding about 266 days or 38 weeks to the conception date.
5. What are the three pregnancy trimesters?
First trimester is weeks 1–12, second trimester is weeks 13–27, and third trimester starts from week 28 until birth.
6. Can cycle length affect due date?
Yes. A standard calculation often assumes a 28-day cycle. Longer or shorter menstrual cycles may slightly change the estimated due date.
7. Which method is more accurate for due date?
An early ultrasound, especially in the first trimester, is often more accurate than date-based calculation.
8. When should I consult a doctor?
You should consult a doctor after a positive pregnancy test and follow regular prenatal checkups for accurate pregnancy dating and health monitoring.