Pregnancy Due Date Calculator
Calculate when your baby is due based on your last period or conception date.
Calculate Your Due Date
Your Due Date Information
Estimated due date—
Days until due date—
First trimester ends—
Second trimester ends—
How due dates are calculated
Pregnancy typically lasts 280 days (40 weeks) from the first day of your last period, or 266 days from conception.
From LMP:
From conception:
From IVF: Calculated based on embryo age and transfer date
Due date = LMP + 280 daysFrom conception:
Due date = Conception + 266 daysFrom IVF: Calculated based on embryo age and transfer date
Only about 5% of babies arrive on their exact due date. Most come within 2 weeks before or after.
FAQs
How accurate is my due date?
It's an estimate. An ultrasound at 8-13 weeks gives the most accurate due date.
Why count from my last period?
It's easier to remember than conception date. This is the medical standard worldwide.
What if my cycles are irregular?
The calculation may be less accurate. See your doctor for an ultrasound dating.
When will I feel the baby move?
First-time moms usually feel movement at 18-22 weeks. Second-time moms may feel it at 16-18 weeks.
When should I go to the hospital?
Call your doctor if contractions are 5 minutes apart for an hour, or if your water breaks.