About DueDateTool.com

DueDateTool.com gives expecting parents (and those trying to conceive) a fast, private way to estimate a due date, current week of pregnancy, trimester, and ovulation window — using the same methods care providers reference, like Naegele's rule and conception-based dating.

We built this because so many pregnancy calculators online are cluttered with intrusive pop-ups, account walls, or outdated math. This tool asks for one date, does the calculation instantly, and gets out of your way. Nothing you enter is stored or shared — it's calculated entirely in your browser.

Every pregnancy is different, and due dates are estimates, not guarantees — only about 5% of babies arrive on their exact estimated date. This tool is meant to support the conversations you have with your doctor or midwife, not replace them.

This site is supported by display advertising, which keeps it free to use with no login and no paywall.

Who runs this site

DueDateTool.com is built and maintained by Website Tools, an independent publisher of a small family of focused, free calculators. We build easy-to-use tools for quick, informative answers — no clutter, no accounts, and no unnecessary steps. DueDateTool.com is one of several tools we maintain, each built around the same idea: enter a few numbers, get a clear answer, and get back to what you were doing.

Have a question, correction, or suggestion about this calculator? Reach us at hello@duedatetool.com.