# How to Calculate EDD?

How do you calculate EDD (Estimated Date of Delivery)?

## Estimated Date of Delivery Calculation

EDD is a term referred in calculating the due date of the pregnancy. EED is called as Estimated date of delivery. **Naegele's rule **is generally used in estimating the due date.

**EDD Formula**

It is calculated using the following format,

**EDD = (+ 1 Year - 3 months + 7days) from LMP(Last menstrual Period)**

The due date will be exactly 280 days (40 weeks) from the last menstrual period.

**Steps for Estimated Date of Delivery Calculation**

**Step 1:** Lets consider an example,

Assume, Last date of menstrual period is **23 Oct 2015**

**Step 2:** From the formula,

**LMP = 23 Oct 2015**

+ 1 Year = 23 Oct 2016

- 3 Months = 23 July 2016

+ 6 Days = 29 July 2016

Due date of Pregnancy is **29 July 2016**

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