Unicode Character "∝" (U+221D)

The character (Proportional To) is represented by the Unicode codepoint U+221D. It is encoded in the Mathematical Operators block, which belongs to the Basic Multilingual Plane. It was added to Unicode in version 1.1 (June, 1993). It is HTML encoded as ∝.

Main Unicode Properties

Name Proportional To
Unicode Codepoint U+221D
Unicode Version 1.1 (June, 1993)
Block Mathematical Operators
Plane Basic Multilingual Plane

Bidirectional Data

Bidirectional class Other Neutral (ON)
Is mirrored? Yes

Other Unicode Data

Category Math Symbol
Script Code for undetermined script
Combining Class Not Reordered

U+221D Conversion

HTML (decimal) ∝
HTML (hex) ∝
HTML (named) ∝
URL Escape Code %E2%88%9D
CSS \00221D
JavaScript, JSON \u221D
C, C++, Java \u221D
Python \u221D
Rust \u{221D}
Ruby \u221D

How to type "∝"

  • Windows ?: Hold Alt, then type 2 2 1 D. Release Alt.
  • Mac ?: Hold Alt ⌥, then type 2 2 1 D. Release Alt.


  • Times, Times New Roman, serif
  • Helvetica, Arial, sans-serif
  • Courier, Courier New, monospace

UTF Encodings

UTF-8 (hex) 0xE2 0x88 0x9D
UTF-16 (hex) 0x221D
UTF-32 (hex) 0x0000221D