Conception Date Calculator
Estimate the most likely date of conception from your last period and cycle length.
Show solution steps
What is the Conception Date Calculator?
A conception date calculator estimates when conception most likely occurred, which usually coincides with ovulation around the middle of your cycle.
How to Calculate
Conception is estimated at LMP + (cycle length − 14) days, with a likely range of a couple of days either side.
Formula
Conception ≈ LMP + (cycle length − 14) days
How to Use
- Enter your details in the fields above.
- The result updates instantly as you type.
- Use Copy, Print or Download PDF to save your result.
Frequently Asked Questions
Is this exact?
No u2014 it's an estimate. Exact conception timing is rarely known; this gives the most probable date based on a typical cycle.
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