Pregnancy Due Date Calculator

Wondering when your little one might arrive? This Pregnancy Due Date (EDD) Calculator gives you a friendly, research‑based estimate using your last menstrual period (LMP) and typical cycle length. It follows Naegele’s rule—the classic method of adding 280 days (40 weeks) to the first day of your LMP—and lets you adjust for cycles that are longer or shorter than the standard 28 days. You’ll also see your current gestational age and how much time remains until the estimated due date.

Keep in mind that due dates are estimates, not appointments. Many healthy births happen a week or two on either side of the EDD. Ultrasound measurements (especially during the first trimester) can refine dating, and your clinician may adjust the official due date based on medical guidelines. Treat the EDD as a helpful planning marker for conversations about prenatal care, leave, and baby preparations.

For the most useful experience, enter the exact first day of your LMP and your average cycle length. If your cycles are irregular or you’re unsure of the dates, take the result as a rough guide and follow up with your healthcare provider. We’ve included simple steps, tips, and FAQs to make the process clear and reassuring.