Pregnancy Conception Calculator

How is Conception Date Calculated?

Conception usually occurs about 2 weeks after the first day of your last menstrual period (LMP). This calculator estimates your conception date based on your LMP.

Conception Date Formula

Conception Date = LMP + 14 days

Example Calculation

If your last period started on January 1, 2024:

LMP = Jan 1, 2024
Conception Date = Jan 1, 2024 + 14 days = January 15, 2024

FAQs

  • How accurate is the conception date?
    It's an estimate. Actual conception can vary depending on ovulation and cycle length.
  • Can I use due date instead?
    Yes, conception date is typically about 266 days before the due date.
  • What if my cycles are irregular?
    The calculator assumes a 28-day cycle. If your cycles are longer or shorter, conception may occur earlier or later.

Pregnancy Conception Calculator