When Will My Baby Born Calculator

Use this due date calculator to estimate when your baby will be born. Simply enter your last menstrual period date or ultrasound date to get an accurate estimate of your due date.

How to Use This Calculator

To calculate your estimated due date:

Select whether you want to calculate based on your last menstrual period (LMP) or ultrasound date.
Enter the relevant date in the provided field.
Click the "Calculate" button to see your estimated due date.

The calculator will display your due date and provide additional information about your pregnancy timeline.

Formula Used

The standard pregnancy duration is 40 weeks (280 days) from the first day of the last menstrual period. The due date is calculated by adding 280 days to the last menstrual period date.

Due Date = Last Menstrual Period + 280 days

For ultrasound dates, the calculation is based on the gestational age at the time of the ultrasound plus the remaining weeks of pregnancy.

Example Calculation

If your last menstrual period was on January 1, 2023:

Due Date = January 1, 2023 + 280 days Due Date = October 29, 2023

Your estimated due date would be October 29, 2023.

Frequently Asked Questions

How accurate is this due date calculator?

This calculator provides an estimate based on standard pregnancy duration. Individual pregnancies may vary, so it's always a good idea to consult with your healthcare provider for the most accurate information.

Can I use this calculator if I had an ultrasound?

Yes, you can use the ultrasound date option to calculate your due date based on your gestational age at the time of the ultrasound.

What if I don't know my last menstrual period date?

If you don't know your last menstrual period date, you can use the ultrasound date option to estimate your due date.