Pregnancy Due Date Calculator

Enter your details below and get instant results

Enter the first day of lmp to calculate
Enter the cycle length (days) to calculate

Pregnancy Due Date Calculator

Calculate your estimated due date and track your pregnancy week-by-week based on your last menstrual period.

How to Use

  • Enter the first day of your last menstrual period (LMP)
  • Enter your average cycle length (default 28 days)
  • Click Calculate to see your due date and current pregnancy progress
Health 3 views Updated: Jul 2026

Formula

Due Date = LMP + 280 days (40 weeks)

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