LaTeX Chi (χ) - Complete Guide

The Greek letter chi (χ) is used in statistics (chi-squared test), physics, and mathematics.

Symbol Preview

χ

Chi

LaTeX Code

No package required

Recommended
\chi

Standard chi symbol

What is the LaTeX Chi?

Chi is the twenty-second letter of the Greek alphabet. It is most famous for appearing in the chi-squared (χ²) statistical test used in hypothesis testing. It also appears in various mathematical and physical contexts.

How to Use Chi in LaTeX

Method 1: Using \chi

✅No package required

Standard chi symbol

Example: Using \chi

latex
\documentclass{article}

\begin{document}

% Using the Chi
Text with \chi

\end{document}

Common Use Cases

The Chi symbol is commonly used in the following contexts:

Chi-Squared Test

Used for chi-squared statistical test.

Code

Chi-squared statistic: $\chi^2 = \sum \frac{(O-E)^2}{E}$

Output

Chi-squared statistic: χ² = Σ(O-E)²/E

Magnetic Susceptibility

Used in physics for magnetic properties.

Code

Magnetization: $M = \chi H$

Output

Magnetization: M = χH

Complete Examples

Chi-Squared Distribution

Chi-squared distribution example

latex
\documentclass{article}
\begin{document}

The chi-squared test statistic follows a $\chi^2$ distribution with $k$ degrees of freedom.

\end{document}

Frequently Asked Questions about Chi (χ)

Which LaTeX code should I use for Chi?

For the Chi symbol (χ), we recommend using the method marked as "Recommended" above. However, the best method depends on your specific needs:

  • \chi: Standard chi symbol

Where can I use the Chi symbol?

The Chi symbol (χ) is typically used:

  • In mathematical equations (math mode)
  • In regular text (if supported)
  • In various LaTeX environments

Can I use the Chi symbol in display mode?

Yes, the Chi symbol (χ) works in display mode (between $$ $$). This allows you to render the symbol on its own line with better visibility.

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