Last Menstrual Period Calculator

Calculate Due Date



Formula

To calculate the estimated due date:

\[ \text{Due Date} = \text{LMP} + 280 \text{ days} \]

What is the Last Menstrual Period (LMP)?

The Last Menstrual Period (LMP) is the first day of your most recent menstrual period. It is used to estimate the due date of a pregnancy by adding 280 days (or 40 weeks) to the LMP.

Example Calculation 1

Let's assume the following values:

Using the formula:

\[ \text{Due Date} = 2024-01-01 + 280 \text{ days} = 2024-10-07 \]

The estimated due date is October 7, 2024.

Example Calculation 2

Let's assume the following values:

Using the formula:

\[ \text{Due Date} = 2024-03-15 + 280 \text{ days} = 2024-12-20 \]

The estimated due date is December 20, 2024.