🤰 Due Date & Conception Calculator
Enter your due date to calculate estimated conception date, current trimester, and days remaining.
Enter Due Date
How Pregnancy Dating Works
Pregnancy is typically 280 days (40 weeks) from the first day of the last menstrual period (LMP). Conception usually occurs about 14 days after LMP. This calculator estimates conception by subtracting 266 days (38 weeks) from the due date.
Trimester 1: Weeks 1-12 Trimester 2: Weeks 13-27 Trimester 3: Weeks 28-40