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Estimated Due Date
Feb 8, 2027
How It Works
This calculator uses Naegele's rule: add 280 days (40 weeks) to the first day of your last menstrual period (LMP) to estimate your due date.
If your cycle length differs from 28 days, the estimate adjusts accordingly. A longer cycle shifts the due date later; a shorter cycle shifts it earlier.
This calculator provides estimates only. Actual due dates may vary. Consult your healthcare provider for personalized guidance.
Trimester Breakdown
Key Milestones
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