Pregnancy Due Date Calculator

Estimate your due date based on last menstrual period.

First Day of Last Menstrual Period

About Pregnancy Due Date Calculator

This is a free, fast, and fully client-side pregnancy due date calculator tool. All processing is done locally within your browser to ensure maximum privacy and security. No data is sent to our servers. Bookmark this page for quick access to ad-free, high-performance SEO and developer utilities.