Pregnancy Due Date Calculator
Naegele's Rule · ACOG / FIGO Guidelines · Gestational age & milestone tracker
Choose calculation method
Last Menstrual Period
Most common method
Conception Date
Known ovulation date
Ultrasound Dating
From USG weeks+days
Enter the date your last period started — not when it ended
24 days
26 days
28 days
30 days
32 days
35 days
Additional information
For age-related screening reminders
1st
2nd
3rd+
♀ The due date is an estimate — only about 5% of babies are born on their exact due date. A normal delivery can occur anywhere between 37 and 42 weeks of pregnancy. Your doctor may adjust the due date based on ultrasound measurements.
Please enter a valid date to calculate the due date.
Expected date of delivery (EDD)
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Gestational age
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Trimester
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Days remaining
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Conception est.
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Pregnancy progress
Week 1Week 13Week 27Week 40
Baby development this week
Size
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Key appointments & screening schedule
Reminders & notes
ⓘ For informational purposes only. Not a substitute for clinical assessment.
EDD calculated using Naegele's Rule (ACOG Practice Bulletin No. 700, 2017).
Standard assumption: 40 weeks from LMP, 38 weeks from conception.
Cycle length adjustment adds or subtracts days from the standard 28-day assumption.
Ultrasound dating is more accurate than LMP dating when performed before 14 weeks.
All screening dates are approximate — confirm with your obstetrician.