Estimated Due Date (Naegele) Calculator
Calculate your estimated due date from your last menstrual period.
This tool is for informational purposes only and does not replace medical advice. Consult a physician for decisions regarding your health.
days
Result
08 Ekim 2026
Estimated due date: Thursday, 08 October 2026
Result in all units
Step-by-step solution
What Is the Estimated Due Date?
The estimated due date (EDD) is the approximate day your baby is expected to be born. It is found using Naegele's rule by adding 280 days (40 weeks) to the last menstrual period.
How is it calculated?
How Is the Due Date Calculated?
According to Naegele's rule:
EDD = last menstrual period + 280 days
- Enter the first day of your last period.
- If your menstrual cycle differs from 28 days, the difference is added/subtracted.
- The estimated conception day is generally LMP + 14 days.
Frequently Asked Questions
What happens if my cycle differs from 28 days?
With longer cycles the estimated due date shifts forward, and with shorter cycles it shifts back. The tool takes this into account.