Date of Conception Calculator
Want to know when your baby was conceived? This calculator estimates the date of conception based on the first day of your last menstrual period (LMP) and your average cycle length. It’s a helpful tool for expecting parents who want to understand more about the timeline of their pregnancy.
Estimate Baby Conception Date
Conception Date Calculation Formula
Ovulation usually occurs about 14 days before the next period. This formula assumes conception happened on the day of ovulation, based on the length of your menstrual cycle.
The Conception Date Calculator is a simple tool that estimates when conception likely occurred. It uses the first day of your last menstrual period (LMP) and your typical cycle length to calculate the ovulation date — the most probable day of conception. This estimate is based on average fertility timing and is useful for dating your pregnancy or satisfying your curiosity about when your baby was conceived.