Pregnancy Due Date Calculator.

Locate conception windows and due dates using standard gestational cycle adjustments.

Input Parameters

First Day of Last Period

Manual Keyboard Input / Calendar

Dropdown Selectors

Cycle Duration

days

Comments & Feedback.

Frequently asked questions.

How is the due date calculated?

Due date is calculated using Naegele's rule: add 280 days to the first day of your last menstrual period, then adjust for cycle length variations from the standard 28-day cycle.

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