Calculate an estimated pregnancy due date from LMP and cycle length using a standard calendar model. Clinical dating may differ.
Calculate an estimated pregnancy due date from LMP and cycle length using a standard calendar model. Due Date Calculator presents the same underlying date estimate in a focused due-date workflow. It is not a substitute for ultrasound dating or clinical assessment. How to use Due Date Calculator: Enter the LMP date. Adjust cycle length when your typical cycle differs from 28 days. Review the estimated due date and keep the result with your prenatal planning notes. Common uses: Pregnancy planning Calendar preparation Date-estimate checks What date does the calculator use? It uses the first day of the last menstrual period as the calendar starting point. Can a clinician give a different due date? Yes. Clinical dating may use additional information and can differ from an LMP estimate. Is this a medical diagnosis? No. It is a date calculation tool.