Pregnancy Due Date Calculator
Estimate your due date from your last period.
Estimated due date
Tuesday, February 9, 2027
Pregnancy week
8 weeks, 5 days
Related calculators
Pregnancy Due Date Calculator: BF from Last Period
Estimate due date and current pregnancy week from the first day of your last menstrual period (LMP). Enter Last period start date. The page adds 280 days for Estimated due date and counts weeks plus extra days from LMP to today. Calendar planning only. Not a medical diagnosis. Your maternity clinic may use different dating after ultrasound.
How to use
Day 1 of bleeding is cycle day 1. The due date is LMP plus 280 days (Naegele-style rule). Pregnancy week shows completed weeks and remaining days based on today's date. IVF, late ovulation, or irregular cycles can make LMP dating wrong. Follow the due date your midwife or doctor documents.
Example
LMP 19 May gives a due date near 23 February next year. If today is eight weeks after LMP, the week line might read about 8 weeks and a few days. Most babies are not born exactly on that calendar day.
Tips
Book prenatal care through your usual pathway. Heavy bleeding, severe pain, or feeling very unwell needs urgent contact with maternity services, not a recalculation here. Dates in the browser session are not stored in a Calctivo account by default.