Date of Conception Calculator
Estimate the date of conception based on your due date or last menstrual period. Conception typically occurs around ovulation.
Select a date.
How It's Calculated
Conception ≈ LMP + 14 days
Conception ≈ Due Date − 266 days
Conception ≈ Due Date − 266 days
Conception typically occurs around day 14 of the cycle (ovulation). This is an estimate — actual conception could be 11–21 days after LMP.
Disclaimer: This provides an estimate only. The actual date of conception cannot be determined precisely without medical assessment. Consult your healthcare provider.
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Last updated: 2026-08-08