Due Date Calculator
Estimate your baby's arrival date and track your progress.
Calculation Method
28 days
Enter your cycle details to see your timeline.
How Your Due Date is Calculated
Most healthcare providers calculate a baby's due date using Naegele's rule. This method adds 280 days (40 weeks) to the first day of your last menstrual period (LMP).
What to Expect
As you progress through your pregnancy, your healthcare provider will likely perform an ultrasound in the first trimester to confirm the due date.
How to Use
- Select the first day of your last menstrual period (LMP) using the date picker.
- Adjust the slider to match your average cycle length (between 20 and 45 days).
- Click "Calculate Now" to generate your estimated due date and track your current pregnancy progress.
Frequently Asked Questions
How accurate is this due date?
This calculator provides an estimate based on a standard 40-week gestation. Only about 5% of babies are born exactly on their estimated due date.
Why does cycle length matter?
Standard calculations assume a 28-day cycle with ovulation on day 14. Adjusting the cycle length helps refine the estimate for women with shorter or longer typical cycles.