The Pregnancy Due Date Calculator is a free online tool that calculate your estimated due date using last menstrual period, conception date, or ultrasound. shows current gestational age, trimester, and prenatal milestone timeline.. It runs entirely in your browser with no installation or sign-up needed.

Naegele rule: LMP + 280 days (40 weeks). Adjusted for cycle length if different from 28 days. Conception method uses +266 days; ultrasound method back-calculates from measured gestational age.

First-trimester ultrasound is the gold standard, accurate to ±5-7 days. LMP dating is accurate to ±2 weeks when cycles are regular. Conception dating is accurate if you know exactly when conception occurred.

Only about 4% of babies are born on their exact EDD. Most arrive within 2 weeks before or after (37-42 weeks = full term). Your provider may adjust the EDD after the first ultrasound.

Yes, the Pregnancy Due Date Calculator is 100% free with no registration, no hidden fees, and no usage limits. All processing happens locally in your browser, ensuring complete privacy.

Absolutely. The Pregnancy Due Date Calculator processes everything client-side in your browser. No data is uploaded to or stored on any server. Your content remains private on your device at all times.

Yes, the Pregnancy Due Date Calculator is fully responsive and works on smartphones and tablets. You can use it on any device with a modern web browser -- no app download required.

No account or registration is needed. Simply open the Pregnancy Due Date Calculator in your browser and start using it immediately. There are no sign-up walls or usage restrictions.

Simply enter your input in the provided field, adjust any settings to your preference, and the tool will process it instantly. You can then copy the result to your clipboard or download it.

The Pregnancy Due Date Calculator works in all modern browsers including Chrome, Firefox, Safari, Edge, and Opera. For the best experience, use the latest version of your preferred browser.