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Gestational Age Calculator

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

วิธีใช้งาน

Enter the last menstrual period date to see gestational age and due date instantly.

Overview

Gestational Age Calculator is a pro-parent tool that Gestational age calculator: 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

  • Study verification and notes
  • Works offline or on poor network
  • Billing and countdowns
  • Quick office conversions
  • Use it to cross-check “孕周计算、预产期” in reports, docs or APIs to avoid manual conversion errors

How to use

  1. 1 Paste or enter data
  2. 2 Tweak parameters for live update
  3. 3 Verify units and precision
  4. 4 Copy, download or share locally

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 “孕周计算、预产期” 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 (convert → calculate → export).
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All calculations run locally in your browser; nothing is uploaded.