Know when you conceived?
Calculate your due date from your conception date - the most accurate method when you know exactly when your baby was conceived.
Calculate Due Date from Conception
Enter the date you conceived to get your most accurate due date
Why This Method?
Most Accurate
Uses exact conception date instead of estimating ovulation
Scientific Basis
Based on 266-day average gestation period
Perfect for IVF
Ideal when you know exact fertilization date
Important Note
This calculation assumes you know the exact conception date. If you're unsure, our regular due date calculator using your last menstrual period may be more appropriate.
Other Calculator Versions
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Frequently Asked Questions
Common questions about calculating due date from conception date
How accurate is calculating due date from conception date?
This is the most accurate method if you know your exact conception date. It calculates 266 days (38 weeks) from conception, which is the average gestation period.
How do I know my conception date?
You might know your conception date if you were tracking ovulation, used fertility treatments like IVF, or had intercourse on only one day during your fertile window.
Is conception date calculation better than LMP method?
Yes, if you know the exact conception date. The LMP method assumes a 28-day cycle and ovulation on day 14, which isn't accurate for everyone.
What if I'm not sure of the exact conception date?
If you're unsure, use our regular due date calculator with your last menstrual period date, or try our ovulation calculator to estimate when you might have conceived.