About the Pregnancy Conception Calculator

Our Pregnancy Conception Calculator is a fast, easy-to-use tool that helps you estimate the most likely conception window, ovulation date, and your estimated due date (EDD). Simply enter the first day of your last menstrual period (LMP) and average cycle length, or enter a known conception date, and the tool will calculate:

• The estimated ovulation date and fertile window (best days for conception)

• The estimated due date (EDD) using Naegele’s rule (LMP + 280 days) or by conception date (conception + 266 days)

• Current pregnancy age in weeks and days (if LMP is supplied)

• Trimester ranges and expected milestone weeks

This calculator provides helpful estimates for planning and general knowledge, but it does not replace medical evaluation. For the most accurate dating and prenatal guidance, book an appointment with your healthcare provider and get an ultrasound for first- or second-trimester dating.