Up Tack

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

Symbol: ⊥
Unicode: U+22A5
HTML entity: ⊥
Category: Math Symbols

Export

Download Up Tack 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.

29 of 58 in the math symbols collection

About the up tack symbol

Commonly referred to as the Up Tack, this mathematical operator consists of a horizontal base with a vertical line extending upwards from the center. It is often read aloud as bottom, perpendicular, or false, depending entirely on the specific professional field where it appears. While it belongs to the Mathematical Operators block and is categorized formally as a math symbol, it serves several distinct roles across different technical disciplines.

In geometry, this character is the standard shorthand to indicate that two lines are perpendicular to each other. Logicians use the symbol to represent a contradiction or the truth value of falsity, often contrasting it with the inverted top tack. It also appears in electrical engineering to denote ground connections and in type theory to signify the bottom type, which is the subtype of all other types in a system.

How to type Up Tack

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 22A5 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 22A5.
Or: Control + Command + Space opens the Character Viewer — search by name.