About the Pregnancy Due Date Calculator
Calculate your estimated due date from your Last Menstrual Period (LMP). See current gestational week, trimester, conception date, and progress tracking. Understanding how this works can significantly improve your financial planning. This tool is designed to provide you with the most accurate and up-to-date calculations required for your specific needs.
The Mathematical Formula
How to use this calculator?
Enter Last Menstrual Period
Select the first day of your last menstrual period from the calendar.
Adjust Cycle Length
If your cycle is not 28 days, enter your average cycle length for better accuracy.
View Due Date & Progress
See your estimated due date, current week, trimester, and pregnancy progress.
Frequently Asked Questions (FAQs)
Q. How accurate is the due date?
Only about 5% of babies are born on their exact due date. Most births occur within 2 weeks before or after the estimated date.
Q. What is Naegele's Rule?
Naegele's Rule estimates the due date by adding 280 days (40 weeks) to the first day of the last menstrual period (LMP).
Disclaimer: This tool is provided for general utility and informational purposes only. While we strive for accuracy, we make no guarantees regarding the results. Please verify the outputs before using them for any critical applications.