Pregnancy Week Estimate
Use the Pregnancy Week Estimate to estimate elapsed pregnancy weeks from the first day of the last menstrual period as a clear general estimate, not a diagnosis or medical advice.
Pregnancy Week 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 Week Estimate for a copyable informational estimate.
The tool works by counting elapsed calendar days from the LMP date and dividing by seven. 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
Seventy elapsed days display as 10 weeks and 0 days.
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 Week 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.