Pregnancy Due Date Calculator
Estimate your due date based on last menstrual period or conception date.
Due Date
Info only. Not medical advice.
Due Date Result
Enter a date to estimate your due date.
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Explore guide →Frequently Asked Questions About Pregnancy Due Date
Learn more about Pregnancy Due Date
How Due Dates Are Estimated
Most due dates are estimated using the first day of your last menstrual period (LMP), which adds 40 weeks (280 days). If you know your conception date, an estimate of 38 weeks (266 days) is often used.
- Due dates are estimates and can vary by up to two weeks.
- Ultrasound measurements can refine timing.
- Always consult your healthcare provider for personalized guidance.
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