Is this Due Date Calculator free to use?

Yes, Due Date Calculator is 100% free to use online with no installation or account required.

How do I use the Due Date Calculator?

Simply enter your values into the required input fields and click calculate to view the results instantly.

Yes, the calculator is fully responsive and compatible with Android, iOS, Windows, macOS, and Linux web browsers.

Due Date Calculator — Free Online Tool

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Calculate pregnancy due date from LMP

Note: Naegele's rule: LMP + 280 days (40 weeks).

LMP

First Day of Last Period

⚠️ Not medical advice. For educational purposes only. Always consult a qualified healthcare professional before making health or treatment decisions.