CI half-width scale
CI half-width scale: enter Z score, Std dev and get an instant result in your browser. Free, private, no account.
CI half-width scale applies z * sd / 0.707106781 to the values you enter (Z score, Std dev). Use it for quick math estimates from your own numbers—not for regulated engineering, tax filing, or clinical decisions. Everything runs in your browser; nothing is uploaded to our servers.
How to use
- Open CI half-width scale and read the field labels (Z score, Std dev).
- Replace defaults with figures from your spreadsheet, lab sheet, or quote.
- Press Calculate and note the output before changing another input.
- Bookmark this page if you reuse the same calculation often.
FAQ
Which numbers belong in CI half-width scale?
Only the on-page labels: Z score, Std dev. The tool does not guess hidden assumptions.
How does CI half-width scale compute its result?
It evaluates z * sd / 0.707106781. If your source uses different symbols, map them to these fields first.
Can I paste the CI half-width scale result into Excel or Sheets?
Yes—copy the number and keep your own documentation of inputs for audit trails.
Is CI half-width scale a substitute for professional math software?
No. It is a lightweight browser helper for one relationship; use certified tools for compliance work.