Due date details copied
Pregnancy Due Date Calculator
Estimate your baby's arrival from last period or conception.
Calculate Your Due Date
Calculation Method
By Last Menstrual Period (LMP)
By Conception Date
First Day of Last Period
Conception Date (approx.)
Today's Date (for progress)
Today
Estimated Due Date
October 8, 2025
Gestational Age (today)
12 weeks 3 days
Method
= By Last Menstrual Period
LMP Date
= January 1, 2025
Estimated Due Date
= October 8, 2025
Today
= March 27, 2025
Gestational Age = 12 weeks 3 days
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How it works
Choose method
– enter the first day of your last period or an approximate conception date.
Naegle's Rule
– adds 280 days from LMP (or 266 days from conception) to calculate the due date.
Gestational age
– shows how far along the pregnancy is today in weeks and days.
Copy or download
– save a PDF of your results or copy them to the clipboard.