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妊娠週数計算機

Gestational age calculator: get weeks, days and due date by last period or ultrasound with fetal development reference for prenatal care.

使い方

最終月経日を入力すると、妊娠週数と予定日がリアルタイムに計算されます。

Overview

Gestational Age Calculator is a Parenting tool. Get weeks, days and due date by last period or ultrasound with fetal development reference for prenatal care. It runs 100% in your browser with no upload, so you get instant results with privacy. Whether you need a quick answer or batch processing with precise control, you can enter, validate and export in seconds. The UI is responsive on mobile, tablet and desktop and supports one-click copy.

Use cases

  • Daily use of Gestational Age Calculator: Enter the last menstrual period date to see gestational age and due date. — enter and get instant results without manual lookup.
  • One-click copy keeps results ready to save, check or share with family and pros.
  • Use Gestational Age Calculator offline or on poor network — all calculations stay local and private.
  • Study verification and notes
  • Works offline or on poor network

How to use

  1. 1 Enter the last menstrual period date to see gestational age and due date..
  2. 2 Tweak parameters or switch options for live updates.
  3. 3 Review values, units and charts to confirm precision.
  4. 4 Copy or export the result for docs, sheets or sharing.

Highlights

  • Local & private: processing stays in your browser
  • Live validation with tolerant parsing
  • One-click copy and export for docs, code or sheets
  • Batch and offline support under poor network

Notes

  • Process sensitive data locally
  • For reference only; consult professionals for medical/legal/finance
  • Refresh if stuck and contact us if persists

FAQ

Need sign-up?
No, open and use.
Data saved?
Only the last input cached locally.
How is Gestational Age Calculator different?
It runs locally with a focus on speed and privacy, plus tolerant parsing for “gestational age, due date” and one-click copy for reuse.
Can I use results in official reports?
Use it as a working draft and cross-check with authoritative sources; keep the exported log and parameters for traceability.
Tip：Tip: Bookmark this page or pin the tab; find related tools via categories and search.
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すべての計算はブラウザ内で実行され、データはアップロードされません。