Calculate EDD, current week, trimester and milestones.
Estimates only. Consult a healthcare provider for an accurate due date based on ultrasound.
Estimate your pregnancy due date (EDD) using the Naegele rule (LMP + 280 days), adjusted for cycle length, or from a known conception date. The calculator shows your current pregnancy week and day, trimester, estimated conception date and how many days remain until your due date. Useful as a quick reference — not a replacement for an ultrasound-confirmed date from your healthcare provider.
Open the page, enter the input you want to check, and the result appears immediately above — there is nothing to install, no account to create, and no popup to dismiss. Every Toolzer utility is designed to give you the answer on the first screen and let you copy or share it in one click. If the result looks unexpected, run the test a second time: transient network conditions, browser extensions, and corporate proxies can all affect single-shot measurements, and a fresh run usually confirms whether the issue is real or a one-off blip.
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Bookmark this page and pair it with the other utilities listed below; together they cover most of the day-to-day SEO, networking, security, and developer tasks that would otherwise need three or four separate apps. If you spot a result you cannot explain, the FAQ underneath answers the most common questions about how the underlying measurement works and where its limits are.
Naegele's rule assumes a 28-day cycle and ovulation on day 14. Real cycles vary, so an ultrasound dating scan is more accurate.
Longer cycles ovulate later, shifting conception and the due date by the same number of days.
No. The calculation runs entirely in your browser.
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Yes. Whenever the tool can produce an answer entirely in the browser — password generation, JSON formatting, regex testing, hashing, text counting — the data never leaves your device. When a server lookup is unavoidable (DNS, WHOIS, geolocation), the request is proxied through Toolzer's edge so the upstream service never sees your real IP address.
Yes. The interface is fully responsive and works on iOS Safari, Android Chrome, Samsung Internet, and every other up-to-date mobile browser. You can pin the page to your home screen for one-tap access.
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