Pregnancy Due Date Calculator
Health & FitnessEstimate your pregnancy due date and current week using Naegele's rule, based on the first day of your last menstrual period.
Days Until Due Date
Estimated days remaining until your due date (280 days / 40 weeks from your last menstrual period).
Weeks Pregnant Today
37
Approximate number of completed weeks of pregnancy as of today.
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Calculator Stats
Creators
Odeh Ahwal0people find this calculator helpful
Views
Helpful
Saved
Embeds
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Frequently Asked Questions
What is Naegele's rule?
Naegele's rule estimates your due date as 280 days (40 weeks) after the first day of your last menstrual period, assuming a typical 28-day cycle. It's the standard method used by most pregnancy calculators and providers for an initial estimate.
How accurate is this due date estimate?
Only about 5% of babies are born exactly on their estimated due date — most arrive within a 2-week window before or after. An ultrasound dating scan from your provider is more precise than this calculation alone.
What if my cycle isn't exactly 28 days?
This calculator assumes a standard 28-day cycle. If your cycles are consistently longer or shorter, your actual due date may differ slightly — your healthcare provider can adjust for this.
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