Conception Date Calculator
Find out your likely conception date from your due date or baby's birth date.
Estimated Dates
Estimates assume a standard cycle. Individual conception timing varies. Not a medical determination.
How is conception date calculated?
Conception typically occurs about 266 days before the due date, near ovulation.
This tool estimates conception from a known due date or birth date. The result is an approximation.
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Conception date FAQ
How is the conception date estimated?
Conception is about 266 days before the due date, near ovulation.
Is the estimate exact?
It's an approximation — actual conception timing varies.
Does cycle length matter?
This tool uses a standard estimate; irregular cycles add uncertainty.