Pregnancy Due Date Estimate
Use the Pregnancy Due Date Estimate to estimate a calendar due date from the first day of the last menstrual period as a clear general estimate, not a diagnosis or medical advice.
Pregnancy Due Date Estimate
Tool inputs are not stored, and private values stay out of analytics.
Result
How it works
Enter the requested values, check the units, then run the Pregnancy Due Date Estimate for a copyable informational estimate.
The tool works by adding the conventional 280 days used for an initial LMP-based estimate. The result is a general estimate that cannot account for every individual factor and does not replace a clinician. Inputs stay in the browser.
Examples
Practical example
The result is a calendar estimate that may be revised by clinical assessment.
Method and source
Uses the ACOG calendar convention of 280 days from the first day of the last menstrual period; clinical dating may differ.
FAQ
How do I use the Pregnancy Due Date Estimate?
Enter accurate measurements, calculate, and read the safety note shown with the result.
Is this a medical diagnosis?
No. The result is informational only and does not diagnose a condition or replace a healthcare professional.
Are health inputs stored?
No. Processing stays in the browser and field values are not sent to analytics or the database.