Pregnancy Due Date Calculator
Estimate your baby's due date and current pregnancy week from your last menstrual period (LMP) and cycle length.
How it works
The estimated due date (EDD) is calculated using Naegele's rule: LMP + 280 days, adjusted for cycle length (typical cycle is 28 days). For longer or shorter cycles, ovulation timing shifts the EDD.
Frequently Asked Questions
Is the Pregnancy Due Date Calculator free to use?
Yes, the Pregnancy Due Date Calculator is 100% free to use. There are no subscriptions, no sign-ups, and no hidden fees.
Is my data safe when using the Pregnancy Due Date Calculator?
Absolutely. All calculations performed by the Pregnancy Due Date Calculator happen locally in your web browser. We do not store, track, or transmit your inputs or results to any server.
How accurate is the Pregnancy Due Date Calculator?
Our Pregnancy Due Date Calculator uses industry-standard formulas and methodology. You can view the exact formula and calculation logic used in the methodology section above to verify the math yourself.
Can I use the Pregnancy Due Date Calculator on my mobile phone?
Yes! The Pregnancy Due Date Calculator is fully responsive and works seamlessly on all devices including smartphones, tablets, and desktop computers.