Due Date Calculator
Calculate your baby's due date using your last period, conception date, ultrasound, or IVF transfer date.
Estimated Due Date
June 12, 2027
31 weeks remaining
Current Progress
8w 4d
Est. Conception
Sep 19
Trimester End Dates
1st Trimester Ends
Dec 5
2nd Trimester Ends
Mar 13
Important Dates & Milestones
Week
8
First prenatal visit
Oct 31
Week
12
First trimester screening
Nov 28
Week
20
Anatomy ultrasound
Jan 23
Week
24
Glucose screening
Feb 20
Week
28
Third trimester begins
Mar 20
Week
36
Group B strep test
May 15
Week
37
Full term begins
May 22
Week
40
Due date
Jun 12
This is an estimate. Your actual due date may vary. Consult your healthcare provider for personalized guidance.
How Due Dates Are Calculated
Due dates are typically calculated as 280 days (40 weeks) from the first day of your last menstrual period (LMP). This method assumes a 28-day cycle with ovulation on day 14.
Due Date Accuracy
Only about 5% of babies are born on their exact due date. About 80% are born within 2 weeks of the due date. Early ultrasounds (before 12 weeks) provide the most accurate dating.
Different Calculation Methods
LMP is the standard method. Ultrasound dating is most accurate in the first trimester. IVF dates are precise because conception timing is known. Your provider may adjust your due date based on early ultrasound measurements.
This calculator is for informational purposes only and does not replace professional medical advice. Always consult a healthcare professional for diagnosis or treatment.
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