∶

Math Operator 51

Unicode
U+2236
Category
Math
HTML Entity
∶
CSS
\2236
The ratio symbol (∶) is a mathematical operator used to express the proportional relationship between two numbers or quantities. Although it closely resembles a standard punctuation colon (:), this specific Unicode character is designed with centered spacing for mathematical equations. It is primarily used in geometry, algebra, and technical writing to cleanly display proportions like '3∶1'.

How to Type

Windows
Win + . then search "ratio"
macOS
Control + Command + Space then search "ratio"
Linux
Ctrl + Shift + U then 2236
HTML
∶ or ∶

In Programming

While essential for accurate mathematical typography and rendering formulas, this specific symbol is rarely used in actual source code. Standard programming languages rely entirely on the regular ASCII colon (U+003A) for syntax like dictionaries, slices, and type annotations.

Read full meaning article

Tags

a to b algebra ratio colon division geometry ratio math colon mathematics proportion proportion sign proportional relationship ratio ratio notation ratio operator two dots

Related Symbols

± Plus Minus Sign × Multiplication Sign ÷ Division Sign ≠ Not Equal To ≈ Approximately Equal To ∞ Infinity √ Square Root ∑ Summation ∫ Integral π Pi ≤ Less Than or Equal To ≥ Greater Than or Equal To