Greek Small Letter Tau

A symbol from the Math Symbols collection. Click the symbol or the button below to copy.

Symbol: τ
Unicode: U+03C4
HTML entity: τ
Category: Math Symbols

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Download Greek Small Letter Tau as a vector SVG or a raster PNG.

PNG size

SVG uses the system font stack — open in any vector editor and convert to outlines if needed. PNGs have a transparent background.

50 of 58 in the math symbols collection

About the greek small letter tau symbol

Tau (τ) is the 19th letter of the Greek alphabet, functioning as the lowercase counterpart to the uppercase Τ. It belongs to the Greek and Coptic script block and is pronounced like the English letter T. In appearance, it resembles a vertical line topped with a horizontal bar, though the leg often features a slight curve in various typefaces.

Beyond its role in the Greek language, this character is a standard mathematical symbol frequently used to represent specific constants or variables. In geometry and physics, it often denotes the circle constant equal to 2π or symbolizes torque. Additionally, it appears in engineering to represent time constants in circuit analysis and functions as a statistical coefficient, such as Kendall's tau, for measuring rank correlation.

How to type Greek Small Letter Tau

Native keyboard shortcuts for each operating system — derived from the codepoint, so the steps below are always accurate.

Windows

2 options

In Word / Outlook: type 03C4 then press Alt + X.
Anywhere: press Win + . to open the emoji & symbol picker, then search.

macOS

2 options

Enable “Unicode Hex Input” in System Settings → Keyboard, then hold Option and type 03C4.
Or: Control + Command + Space opens the Character Viewer — search by name.