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Pregnancy Due Date Calculator

Estimated due date and current week from the first day of the last menstrual period (standard 40-week Naegele rule).

About this tool

Estimated due date and current week from the first day of the last menstrual period (standard 40-week Naegele rule). Apaltools tools are free, require no signup, and run entirely client-side — your input never leaves the browser, which makes it safe even for sensitive strings such as tokens or internal URLs.

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