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JIS Function in Excel

Changes half-width (single-byte) characters to full-width (double-byte) characters.

Syntax

  • =JIS(text)

Arguments

  • text (required): Text to convert

Examples

  • =JIS("EXCEL") - Convert to full-width - Result: ＥＸＣＥＬ

Excel JIS function documentation

  • JIS converts half-width (single-byte) characters to full-width (double-byte) characters.
  • Syntax: =JIS(text). It is commonly used in Japanese text standardization.
  • Use JIS when downstream systems require full-width character formats.
  • Text function category: [/categories/text/](/categories/text/).

JIS syntax and conversion notes

  • text is required and can be a literal string or a reference.
  • JIS mainly affects convertible alphanumeric and kana characters.
  • Conversion results depend on language support and workbook environment.
  • Test outputs with a sample sheet before applying to production exports.

Step-by-step: prepare full-width export fields

  • Step 1 - Keep source strings in A2:A200.
  • Step 2 - In B2 use =JIS(A2).
  • Step 3 - Copy down and verify key records against system requirements.
  • Step 4 - Use B column as the official export-ready field.

JIS vs ASC vs manual replacement

  • JIS converts half-width to full-width for standards that require it.
  • ASC converts in the opposite direction, full-width to half-width.
  • Manual replacement is risky and error-prone for large datasets.
  • Narrative output formatting still uses [TEXT](/functions/text/) where applicable.

Worked examples to copy

  • Basic conversion: =JIS(A2).
  • Inline value: =JIS("ABC123").
  • Trim then convert: =JIS(TRIM(A2)).
  • Key normalizer: =UPPER(JIS(A2)).

People also ask

  • When should I use JIS? - When full-width output is required by systems or templates.
  • JIS vs ASC? - JIS goes to full-width; ASC goes to half-width.
  • Can JIS fix lookup mismatches? - Yes, if mismatches come from width inconsistency.
  • Does JIS change all punctuation? - It changes convertible characters based on locale behavior.

Common errors

  • Only affects single-byte characters

Use cases

  • Japanese text
  • Character formatting
  • Data standardization

Frequently asked questions

  • What is the JIS function in Excel? JIS changes half-width (single-byte) characters to full-width (double-byte) characters. The syntax is =JIS(text). Typical use cases include japanese text, character formatting, data standardization.
  • How do I use the JIS function? To use JIS, type =JIS( in a cell and provide the required arguments. Excel will show you the syntax and parameter hints as you type. Make sure to close the parentheses and press Enter to execute the function.
  • Can JIS handle different text formats? Yes, JIS can work with various text formats including strings, cell references containing text, and text values returned by other functions. It processes text according to its specific functionality.
  • Why is JIS not working in my Excel? Common issues with JIS include Only affects single-byte characters. Start by checking the syntax =JIS(text), then verify each referenced cell or range.

Editorial review

  • Reviewed by Excel.Directory Editorial Team. Updated May 2026.

When to use JIS

  • Japanese text — common Text scenario for JIS.
  • Character formatting — common Text scenario for JIS.
  • Data standardization — common Text scenario for JIS.

JIS in the Text category

  • Browse all Text functions at /categories/text/ for related formulas.
  • JIS syntax: =JIS(text)
  • text (required): Text to convert
  • Confirm JIS arguments match the syntax shown above before filling down.
  • Lock table and range references with $ when copying formulas across rows or sheets.

Formula checklist before you copy down

  • Confirm JIS arguments match the syntax shown above before filling down.
  • Lock table and range references with $ when copying formulas across rows or sheets.
  • If results look wrong, check for text stored as numbers and invisible spaces with TRIM.
  • Spot-check three known input rows manually against expected output.

Related Excel functions

  • ASC (/functions/asc/): Changes full-width (double-byte) characters to half-width (single-byte) characters.
  • CLEAN (/functions/clean/): Removes all non-printable characters from text.
  • TRIM (/functions/trim/): Removes extra spaces from text, leaving only single spaces between words.

Errors to watch for

  • Only affects single-byte characters — review causes on linked error pages in the directory.

Copy-paste audit workflow

  • Enter JIS on three test rows with known expected output documented on a QA tab.
  • Fill down only after absolute references are locked on lookup tables and rate tables.
  • Compare against manual calculation or a calculator for financial and statistical functions.
  • Search this directory for comparison guides when choosing between similar functions in the same category.

JIS worked examples to copy

  • =JIS("EXCEL") — Convert to full-width. Expected result: ＥＸＣＥＬ.

JIS reference summary for crawlers and offline review

  • JIS belongs to the Text category in Excel. Changes half-width (single-byte) characters to full-width (double-byte) characters.
  • Full syntax: =JIS(text). Open /functions/jis/ for parameters, FAQs, and related pages.
  • Common mistakes: Only affects single-byte characters
  • Pair this function with comparison guides when another Excel formula might fit the same task better.
  • Review fix-excel-formula-errors when unexpected errors appear after upgrading Excel or sharing across locales.