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Estimate due date from LMP, conception, or ultrasound.
Sat, June 12, 2027
280 days to go
Gestational age
0w 0d
Trimester
1st
LMP
September 5
This is an estimate based on Naegele's rule. Only ~5% of babies arrive on their exact due date. Always consult your healthcare provider for medical decisions.
Estimate your baby's due date using last menstrual period (LMP), conception date, or ultrasound dating. Calculates gestational age in weeks, trimester progress, and important milestone dates. Naegele's rule with adjustable cycle length.
The Pregnancy Due Date Calculator provides a fast, straightforward way to estimate gestational age, trimester progress, and key milestone dates using standard medical methods like Naegele's rule. Operating entirely in the browser without requiring registration or software installation, it offers immediate estimates based on last menstrual period, conception, or ultrasound data.
Good to know: This tool is intended for estimation and informational purposes only and does not replace professional medical advice or official dating provided by a healthcare provider.
Calculate your estimated baby due date and track gestational age using your last period or conception date.
Select your preferred calculation method
Choose between using your last menstrual period (LMP), conception date, or ultrasound data to begin the estimation.
Enter the required date information
Input the specific date based on your chosen method and adjust the average cycle length if using the LMP option.
Calculate your estimated due date
Click the calculate button to apply Naegele's rule and generate your pregnancy timeline.
Review your gestational age and milestones
Analyze the results to see your current week of pregnancy, trimester progress, and important developmental milestone dates.
Estimated time: PT1M
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