Conception Calculator
Estimated conception is roughly 266 days before the due date in a typical pregnancy.
This calculator is free to use. Enable JavaScript to enter your values and see a result instantly.
How it works
Estimated conception is roughly 266 days before the due date in a typical pregnancy.
Worked example
An early-October due date corresponds to conception in mid-January.
Keep in mind
Actual conception dates can differ; this is not a clinical determination.