Due Date Calculator
Estimate your baby's delivery date using multiple calculation methods. Get personalized pregnancy tracking and important milestone information.
Calculate Your Due Date
Your Due Date Results
Enter your information to calculate your due date
Understanding Due Date Estimation
The due date, also known as the estimated date of confinement, is an estimation of when a pregnant woman will deliver her baby. While the due date is often estimated as a single date, it can be helpful to consider a range of due dates, since only 4% of births occur on the estimated due date.
Calculation Methods
Last Menstrual Period (LMP)
Most common method. Due date = LMP + 280 days (40 weeks). Assumes 28-day cycle with ovulation on day 14.
Ultrasound Dating
Most accurate method, especially in first trimester. Measures fetal size to determine gestational age.
Conception Date
Due date = Conception + 266 days (38 weeks). Most accurate if you know exact conception date.
IVF Transfer
Due date = Transfer date + 266 days - embryo age. Accounts for different embryo development stages.
Delivery Timing Classifications
Preterm (< 37 weeks)
Baby may need special care. Doctors may try to stop early labor to avoid complications.
Early Term (37-39 weeks)
Generally healthy babies, though full-term babies have better outcomes.
Full Term (39-41 weeks)
Optimal timing for delivery. Best outcomes for both mother and baby.
Late Term (41-42 weeks)
Still considered normal, but doctors may monitor more closely.
Important Considerations
- Due dates are estimates: Only 4% of babies are born on their exact due date
- Normal range: 37-42 weeks is considered full term
- Postterm risks: After 42 weeks, placenta function may decline
- Medical intervention: Doctors may induce labor after 42 weeks
- Regular checkups: Important for monitoring both mother and baby's health
Disclaimer: This calculator provides estimates only. Always consult with your healthcare provider for personalized medical advice and regular prenatal care. Every pregnancy is unique and may require different monitoring and care.
