Greek Symbol
Greek letter

Xi Symbol (ξ) — Copy & Paste

Grab the xi greek symbol in one click. Pronunciation: zahy / ksee.

ΞUpper
ξLower
Reference

Technical reference

Unicode, HTML entities, and LaTeX — tap the icon beside any value.

Uppercase Xi

Character
Ξ
Unicode
U+039E
HTML named
Ξ
HTML decimal
Ξ
LaTeX
\Xi

Lowercase Xi

Character
ξ
Unicode
U+03BE
HTML named
ξ
HTML decimal
ξ
LaTeX
\xi
Context

Common uses in science & math

Random variables & correlation

Probability texts often use ξ for a random variable or noise term; some correlation lengths use ξ.

Extent & cascade particles

Physics uses ξ in cascade/hyperon names and as a generic dimensionless variable.

Input

How to type Xi

Windows

Grab ξ/Ξ from this page—xi is rarely on keyboard layouts.

macOS

Use this page or Character Viewer → “xi”.

Word & Google Docs

Paste ξ into probability homework without installing Greek IMEs.

Prefer a full walkthrough? Read how to type Greek letters.

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ZetaΖζPsiΨψChiΧχ

Xi FAQ

How is xi pronounced?

Common English pronunciations are “zahy” or “ksee”; either is understood in STEM contexts.