About this tool
Estimate a due date from LMP using Naegele's rule for informational planning. Free, private and browser-based. Pregnancy Due Date Calculator runs in the browser on DevTools. There is no signup, and your input stays on this device unless the tool explicitly performs a live network lookup.
What this tool does not do
- Pregnancy Due Date Calculator is a free in-browser utility, not a hosted API. It does not keep server-side history and is not a substitute for production verification in your own stack.
How do I use this tool?
How do I use Pregnancy Due Date Calculator?
Open Pregnancy Due Date Calculator, enter or paste your input, and copy the result. The page works without an account.
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