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Estimate due date using Naegele's rule (last menstrual period + 280 days). Also shows trimester milestones.
妊娠 出産予定 日付 is a free online 健康 tool that works right in your browser — whatever you enter is processed locally and never sent to a server.
No installation, no signup; works on both phone and desktop, ready to use instantly.
We noticed most online tools upload your files to remote servers. Since privacy is our core principle, we built this tool to process everything locally in your browser.
はい、完全無料で登録不要です。
はい、モバイルブラウザでタッチ操作に対応しています。
健康
Yes. 妊娠 出産予定 日付 is a pure front-end tool: whatever you type or paste is processed only in your browser's memory and never sent to a server. It disappears as soon as you refresh or close the page.
Privacy & Security: All processing happens locally in your browser. Files are never uploaded or stored.
Privacy: All processing happens locally in your browser. Your files and data never leave your device — no upload, no server, no tracking.