Pregnancy Due Date Calculator

Enter the first day of your last menstrual period (LMP). We’ll estimate your due date and show key milestones.

Your LMP

Last Menstrual Period (LMP)

Average Cycle Length

days

Default is 28 days. Longer cycles shift the due date later; shorter cycles shift it earlier.

Estimated Due Date

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Gestational Age Today

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Current Trimester

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These are general estimates. Your care team provides the most accurate dating and guidance.