Pregnancy Due Date Calculator
Estimate your due date and track pregnancy milestones.
28 days
2028 (default)45
Enter a date to calculate your due date
Medical disclaimer: This calculator uses Naegele's rule, the standard estimation method. Actual due dates vary; only about 5% of babies are born on their calculated due date. Always confirm with a healthcare provider via ultrasound dating.
Calculate your estimated pregnancy due date using your last menstrual period (LMP) or conception date. See your current gestational age, trimester, a countdown to your due date, and a visual milestone timeline of key pregnancy events.
Key Features
LMP and conception date modes
Calculate from either the first day of your last period or a known conception/ovulation date.
Cycle length adjustment
Adjust average cycle length from 20 to 45 days to refine the due date estimate for irregular cycles.
Current gestational age
See exactly how many weeks and days pregnant you are today, plus which trimester you are in.
Pregnancy milestone timeline
A visual timeline shows key dates: 1st prenatal visit, end of 1st trimester, anatomy scans, full term, and due date — with passed milestones checked off.
How to Use
- 1Choose LMP mode (most common) or Conception Date mode.
- 2Enter the relevant date.
- 3In LMP mode, optionally adjust your average cycle length.
- 4Your due date, gestational age, trimester, and milestone timeline appear below.