Due Date Calculator to Time Your Hospital Bag Checklist
A simple calendar estimate. Your care team’s date always comes first.
Nothing you enter here is saved unless you tap “Use for my plan”. Your period date is never saved.
Enter a date to see an estimate.
This is a simple calendar estimate (first day of last period + 280 days, adjusted for cycle length). It is not medical advice and may not fit irregular cycles, IVF or uncertain dates — your care team’s date always comes first. This tool does not interpret past due dates.
How the estimate is calculated
The calculator adds 280 days to the first day of your last menstrual period, then adjusts by the difference between your usual cycle length and 28 days. Cycle lengths from 21 to 35 days are supported. This is the standard calendar method (Naegele’s rule); an ultrasound or your care team may give a different date.
After you have a date
Save it to your checklist so you can plan when to pack. See the hospital bag checklist.
FAQ
How is the due date estimated?
From the first day of your last menstrual period plus 280 days, adjusted for cycle lengths between 21 and 35 days. It is a calendar estimate; your care team’s date always comes first.
Is this medical advice?
No. It is a simple date calculation and cannot tell you anything about your health or your pregnancy.
Is it free? Are there refunds?
This site is free and charges nothing, so there are no refunds. There are no ads, affiliate links or paid upgrades.