Pregnancy Calculator
Calculate estimated due date based on the first day of your last menstrual period (LMP) or ultrasound conception date.
Interactive Pregnancy Calculator
Fitness & HealthEstimated Due Date
How to Use the Pregnancy Calculator
- Select the first day of your last period or known conception date.
Formula & Calculation Methodology
Our mathematical algorithms adhere to standard scientific and financial guidelines to deliver maximum accuracy.
Frequently Asked Questions
How accurate is a due date calculator?
Only about 5% of babies are born exactly on their due date, but it provides an accurate 40-week estimate.
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