# Due Date Calculator

> Estimate your pregnancy due date, ovulation window, and upcoming periods. 100% private — nothing leaves your device.

Free due date calculator using LMP, conception, and IVF methods. Includes ovulation calculator and period predictor. 100% private, no signup, no tracking. AI cannot compute personalized due dates - we use deterministic formulas.

URL: https://tools.scoreroute.com/tools/due-date-calculator/

Markdown: https://tools.scoreroute.com/tools/due-date-calculator/.md

## How the Due Date Calculator Works

The most common method for estimating a due date. Add 280 days (40 weeks) to the first day of your last menstrual period. For cycle lengths other than 28 days, the difference is added or subtracted from the due date.