Interactive calculator
Enter your information
Enter or change the values, then select Calculate to generate a fresh result.
Example result
May 26, 2027
This date estimates 40 weeks from the first day of the last menstrual period. Ultrasound findings and clinical history may adjust the due date.
Result details
Main resultMay 26, 2027
Inputs used
Days since first day of last period30 days
Formula
Estimated due date = today + (280 − days since LMP)
Results update instantly as you change an input.
Introduction
What is the Pregnancy Due Date?
The pregnancy due date helps you estimate estimate a due date from the last menstrual period. Enter the requested values, review the result, and use the visible formula to understand how your inputs affect the outcome.
MayeleCalc is designed for education and planning. The result is based only on the information you enter and should be checked before it is used for an important financial, medical, legal, or scientific decision.
How it works
Calculate in three clear steps
Enter your values
Use consistent units and realistic assumptions.
Review the result
The answer updates immediately as inputs change.
Check the formula
Read the method and verify the result in context.
Frequently asked questions
Questions about this calculator
Is the pregnancy due date accurate?
It applies the formula displayed on this page to the values you provide. Accuracy depends on correct inputs, units, and assumptions.
Can I save or share my result?
You can copy the result from the calculator. For privacy, review any personal information before sharing.
Should I make an important decision from this result?
Use the result as an educational estimate. Consult an appropriate qualified professional when the decision has financial, medical, legal, or safety consequences.