Calculate Baby Due Daye
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Reviewed by Calculator Editorial Team
Calculating your baby's due date is essential for tracking pregnancy milestones and planning for the baby's arrival. Our calculator helps you determine your estimated due date based on your last menstrual period (LMP).
How to Use This Calculator
To calculate your baby's due date:
- Enter the date of your last menstrual period (LMP) in the calculator.
- Click the "Calculate" button.
- Review the estimated due date and pregnancy timeline.
The calculator uses the standard 40-week pregnancy period (280 days) to determine the due date. This is based on the average length of a full-term pregnancy.
How the Due Date is Calculated
The due date is calculated by adding 280 days (40 weeks) to the date of your last menstrual period (LMP). This is the standard calculation used by healthcare providers.
For example, if your LMP was on January 1, 2023, your due date would be October 31, 2023.
Note: The due date is an estimate. Actual delivery dates can vary by several days or weeks.
Example Calculation
Let's say your last menstrual period started on May 15, 2023. Here's how the calculation works:
- Start with the LMP date: May 15, 2023.
- Add 280 days to the LMP date.
- May 15 + 280 days = February 12, 2024.
Therefore, your estimated due date would be February 12, 2024.