Calculate your estimated due date based on your last menstrual period or conception date. Get a week-by-week breakdown of your pregnancy timeline.
Enter your values below
Enter the first day of your last menstrual period.
Default is 28 days. Adjust if your cycle is longer or shorter.
How this calculator works
Adds 280 days (40 weeks) to the first day of the last menstrual period (Naegele's rule), or adjusts based on conception date or ultrasound data.
Common questions about this calculator
These calculators are for informational purposes only. While we strive for accuracy, results should not be used as the sole basis for important decisions.
