Pregnancy Due Date Calculator
Enter the first day of your last menstrual period to calculate your estimated due date and current pregnancy progress.
Your Pregnancy Progress
Estimated due date
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Weeks of pregnancy
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Days of pregnancy
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Current trimester
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How is the due date calculated?
Pregnancy due dates are typically calculated using Naegele’s Rule: Add 7 days to the first day of your last period, then subtract 3 months. This estimates a 40-week pregnancy from the last menstrual period. Only about 5% of babies are born on their exact due date.
This free online Pregnancy Due Date Calculator provides expectant parents with a simple and reliable way to estimate their important milestones. By entering the first day of their last menstrual period, users can instantly calculate their estimated due date, current weeks and days of pregnancy, and determine which trimester they are in. Utilizing the standard medical calculation of 40 weeks from the last period, this tool offers a convenient and accessible first step in pregnancy planning. As a complimentary online resource, it is designed for informational purposes to help users better understand their pregnancy timeline, though it always recommends following up with a healthcare provider for personalized medical care and confirmation.