Conception Calculator
Estimate when you conceived based on your due date or last menstrual period.
Frequently Asked Questions
How accurate is this calculator?
This calculator provides an estimate based on average ovulation timing. Actual conception can vary by several days depending on your menstrual cycle length and ovulation timing.
When does conception occur?
Conception typically occurs about 2 weeks after the first day of your last period, during ovulation. However, sperm can survive up to 5 days, so conception may occur several days after intercourse.
Can I determine paternity from conception date?
While this calculator estimates conception timing, it cannot definitively determine paternity. DNA testing is the only way to confirm paternity with certainty.