Obstetric calculator

Pregnancy Due Date Calculator

Estimate the due date as 280 days from the first day of the last menstrual period.

This calculator is provided for educational and clinical support purposes only. Clinical decisions must be made by qualified healthcare professionals.

Pregnancy Due Date

First day of last menstrual period

Select the LMP date to estimate EDD.

Dating Guidance

This estimate assumes a regular 28-day cycle. Clinical dating may be confirmed or revised using ultrasound assessment.

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