Calculate your estimated delivery date using proven medical methods. Understanding your due date helps you prepare for your baby's arrival and track important milestones.
For an interactive due date calculator with personalized results, use our main pregnancy tracker:
Use Interactive CalculatorMost common method used by healthcare providers
Formula: LMP + 280 days (40 weeks)
Medical imaging provides precise measurements
Formula: Based on fetal measurements
If you know when conception occurred
Formula: Conception date + 266 days (38 weeks)
Lower miscarriage risk
Detailed ultrasound examination
Baby could survive with intensive care
Rapid brain development
Baby considered full-term
Expected delivery date
Medical intervention may be needed
Tend to deliver closer to or after their due date
Average: 40 weeks + 5 days
Often deliver a few days before their due date
Average: 40 weeks - 2 days
Twins and multiples typically arrive earlier
Average: 35-37 weeks
Longer cycles may mean later ovulation
Adjust due date accordingly
Only 5% of babies are born on their exact due date. Most babies arrive within 2 weeks before or after the estimated due date.
Due dates are estimates. Your baby will arrive when they're ready, typically between 37-42 weeks of pregnancy.
Consult your healthcare provider for the most accurate due date determination, especially if you have irregular periods or uncertainty about your LMP.
Before 39 weeks
Between 39-41 weeks
After 41 weeks
Get personalized week-by-week updates, track symptoms, and countdown to your due date with our comprehensive pregnancy tracker.
Calculate Your Due Date Now