When Did I Get Pregnant? Exact Calculator

Exact Conception Date Calculator

Conception & Due Date Calculator

Estimate key pregnancy milestones.

1. First Day of Your Last Menstrual Period (LMP)

2. Average Length of Your Menstrual Cycle (in days)

Days

(Common range is 20 to 45 days. Default is 28.)

Current Gestational Age:

Estimated Conception Date (The “Exactly” Date)

The most likely date of fertilization.

Estimated Due Date (40 Weeks)

Your baby’s anticipated arrival date.

Current Trimester

*All dates are estimates based on average medical models (Naegele’s Rule) and should be confirmed by a healthcare professional.

Mayo Clinic : One of the most trusted hospital systems in the world with patient-friendly content.

Office on Women’s Health (Womenshealth.gov) : Official US government resources for women’s health.

Centers for Disease Control and Prevention (CDC): Provides essential data on reproductive health and prenatal planning.

MedlinePlus (National Library of Medicine): An aggregator of high-quality medical information.

The American Pregnancy Association : An organization dedicated entirely to pregnancy education and wellness.

March of Dimes : High trust regarding the health of mothers and babies.

Planned Parenthood: Authoritative source on ovulation, conception, and reproductive biology.