Pregnancy Due Date
Estimate baby due date based on LMP.
Input Values
Adjust parameters below
0280
Days
RESULT
Days Remaining
270
NUMBER
How It Works
Guide and Formula
Naegele's Rule
Pregnancy lasts approximately 280 days (40 weeks) from the first day of the Last Menstrual Period (LMP).
\text{Due Date} = \text{LMP} + 280 \text{ days}
?FAQs
Is the due date accurate?
Only about 4% of babies are born on their exact due date. Most are born within 2 weeks before or after.