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Pregnancy Due Date Calculator

Calculate your estimated due date based on the first day of your last menstrual period (Naegele's rule, 280 days).

Enter your values

First day of last menstrual period (LMP)

Average cycle length (days)

Please select the first day of your last menstrual period.

Disclaimer: Results are estimates based on the inputs you provide. They are not professional advice. For consequential decisions — financial, tax, medical, or legal — verify with a qualified professional.

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