Pregnancy Due Date Calculator
Calculate your expected delivery date in seconds using our expert-designed Due Date Calculator.
Based on your last menstrual period (LMP), conception date, or IVF transfer date, this Pregnancy Due Date Calculator estimates when your baby is likely to arrive. It also provides the current trimester and fetal development stage.
🍼 Default Pregnancy Length: 280 days (40 weeks) from LMP
⚠️ Your doctor may adjust the due date during prenatal scans. This tool is for early estimation only.
Pregnancy Due Date Calculator
frequently asked questions
How Accurate Is the Due Date?
Your due date is an estimate, not a guarantee. Only about 4% of babies are born on their due date. Most arrive within 2 weeks before or after.
Doctors may refine your due date after an early ultrasound scan, especially if your LMP date is uncertain or your cycle is irregular.
How is a due date calculated?
Your estimated due date (EDD) is typically calculated based on the first day of your last menstrual period (LMP), because it’s often easier to pinpoint than the actual conception date.
👩⚕️ Standard Method (LMP-Based)
Due Date = First Day of Last Menstrual Period + 280 Days (40 Weeks)
This method assumes a regular 28-day menstrual cycle with ovulation occurring around day 14. It’s used by most doctors and medical professionals as a baseline estimate.
🍼 Conception Date Method (Optional)
If you know your exact conception date (e.g., from ovulation tracking or IVF), your due date is calculated by:
Due Date = Conception Date + 266 Days.
Use our Pregnancy Due Date Calculator | Expected Delivery Date Tool to get accurate results
Can the due date change?
Yes, it may change after an early ultrasound for better accuracy.
What if I don’t know my LMP?
Use your conception date if known, or consult your doctor for a dating scan.
Do you want to use our other health tools and calculators?
We’ve a wide range of free, medically-reviewed tools to support your reproductive and sexual health. Whether you’re tracking your menstrual cycle, calculating your pregnancy due date, or assessing erectile function, comparing your lab results with normal range etc. — scroll down for direct links to each one.
Are you interested in scheduling a consultation with your expert doctor?
Yes, scheduling a consultation with our experienced doctor is easy! Simply email consultation@erectileandfertilityguide.com with your availability, and we will coordinate a time that works best for you.
or visit our contact page.