Chi Symbol Χ χ — Copy, Paste and Type It
The chi symbol is the 22nd letter of the Greek alphabet, written χ in lowercase and Χ in uppercase. It is pronounced /kaɪ/ (“KYE (rhymes with “sky”)”). Click a symbol to copy it.
Copy the chi symbol
Dashed boxes are look-alikes that are not the Greek letter — listed so you can tell them apart.
Chi codes — Unicode, HTML, LaTeX and Alt codes
| Char | Unicode | HTML entity | HTML decimal | HTML hex | CSS | JavaScript | LaTeX | Windows | Mac |
|---|---|---|---|---|---|---|---|---|---|
| χ | U+03C7 | χ | χ | χ | \03C7 | \u03C7 | \chi | 03C7 then Alt + X (Word) | Greek keyboard X |
| Χ | U+03A7 | Χ | Χ | Χ | \03A7 | \u03A7 | X (no \Chi command) | 03A7 then Alt + X (Word) | Greek keyboard Shift + X |
| × | U+00D7 | × | × | × | \00D7 | \u00D7 | \times | 00D7 then Alt + X (Word) | Character Viewer |
| ☧ | U+2627 | — | ☧ | ☧ | \2627 | \u2627 | — | 2627 then Alt + X (Word) | Character Viewer |
Need the characters without any explanation? Open the Greek letters copy-paste sheet.
How to type the chi symbol
Windows
- Fastest: press
Win + .to open the emoji panel, choose the Symbols tab (Ω), then Greek. - There is no classic Alt code for chi — the old DOS code page only included a handful of Greek letters (α Γ π Σ σ τ Φ Θ Ω δ φ ε). Use one of the other methods.
- Microsoft Word: type
03C7and pressAlt + Xfor χ;03A7thenAlt + Xfor Χ. Word converts it in place.
Mac
- Add the Greek keyboard in System Settings → Keyboard → Input Sources, then
Xtypes χ andShift + Xtypes Χ. - Or open the Character Viewer with
Ctrl + Cmd + Spaceand search “chi”.
iPhone and Android
- iOS: Settings → General → Keyboard → Keyboards → Add New Keyboard → Greek. Tap the globe key to switch.
- Android (Gboard): Settings → Languages → Add keyboard → Greek.
- Or copy the character from the top of this page.
LaTeX
\chi— lowercase χ in math modeXor\mathrm{X}— capital Χ (there is no\Chi)\times— × (multiplication sign)
HTML, CSS and code
- HTML:
χorχorχ - CSS:
content: "\03C7"; - JavaScript / JSON:
"\u03C7"— Python:"\u03c7" - In source code, prefer the escape over the pasted glyph — it survives every file encoding.
Full typing guide for every platform, including Linux and Google Docs → how to type Greek letters.
What does chi mean?
Statistics
- χ² — the chi-squared test and distribution
Physics & chemistry
- χ — magnetic or electric susceptibility
- χ — electronegativity, and mole fraction
Mathematics
- χ — the Euler characteristic of a surface
- χA — the characteristic (indicator) function of a set
History
- Xmas — the X is the Greek Χ, the first letter of Χριστός (Christ)
Chi at a glance
- Position
- 22nd of 24
- Uppercase / lowercase
- Χ χ
- Greek name
- χι
- Pronunciation
- /kaɪ/
- Numeric value
- 600
- Became
- Cyrillic Х
Frequently asked questions
What is the chi symbol?
Chi (Χ χ) is the 22nd letter of the Greek alphabet, pronounced /kaɪ/ (“KYE (rhymes with “sky”)”). It is most often used for the chi-squared test, susceptibility.
How do I type the chi symbol on a keyboard?
On Windows, press Win + . → Symbols → Greek, or in Microsoft Word type 03C7 and press Alt + X. On a Mac, switch to the Greek keyboard and press X (Shift + X for the capital). Or simply copy it from the top of this page.
What is the LaTeX command for chi?
Use \chi for lowercase χ, inside math mode. There is no \Chi command for the capital: it looks identical to the Latin X, so you type X.
What is the Unicode and HTML code for chi?
Lowercase χ is U+03C7, written in HTML as χ or χ. Capital Χ is U+03A7, written Χ or Χ.