EDD Calculator – Estimated Date of Delivery
Calculate pregnancy due date and important milestones using Naegele's rule
Due Date Calculation
What is EDD?
The Estimated Date of Delivery (EDD) is calculated using Naegele's rule: add 7 days to the first day of the last menstrual period (LMP), then subtract 3 months, and add 1 year.
This calculator provides your due date, current pregnancy progress, and important milestones throughout your pregnancy.
Pregnancy Progress
Calculation Details
LMP Date:
Cycle Length:
Estimated Conception:
Due Date:
Current Gestational Age:
Days Remaining:
Key Milestones
First Trimester Ends:
Second Trimester Ends:
Viability (24 weeks):
Full Term (37 weeks):
Post Term (42 weeks):
Trimester Information
First Trimester (Weeks 1-13)
Critical development period: major organs form, high risk of birth defects, morning sickness common
Second Trimester (Weeks 14-27)
Growth and development: baby movements felt, gender can be determined, most comfortable period
Third Trimester (Weeks 28-40+)
Final growth and preparation: rapid weight gain, lung maturation, preparation for birth