Pregnancy Due Date Calculator in Countdawns app

Pregnancy Due Date Calculator

Estimate when your baby will arrive using this pregnancy due date calculator. Enter the first day of your last menstrual period or your estimated conception date, and the calculator determines your estimated due date along with your current trimester, weeks pregnant, and a week-by-week countdown to delivery day.

Pregnancy Due Date Calculator

Estimate your due date and track your pregnancy progress.

Want a better countdown experience?

Get Countdawns on Android for home screen widgets, custom designs, smart reminders, and more.

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How it works

Choose your calculation method: last menstrual period (LMP) or known conception date. For LMP, the calculator adds 280 days (40 weeks) to determine your estimated due date, which is the standard Naegele's rule used by healthcare providers. For conception date, it adds 266 days (38 weeks). Results include your estimated due date, current week of pregnancy, trimester, and a countdown in weeks and days. Track your pregnancy countdown daily with the Countdawns app for Android, featuring custom unit display in weeks and days.

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