Mathematical Italic Small R Symbol
π is the mathematical italic small letter r, commonly used in formulas and styled text.
U+1D45F
π (MATHEMATICAL ITALIC SMALL R) is a Unicode character used to represent a variable or symbol in mathematical typography. Because itβs distinct from the plain letter βrβ, it helps keep equations and notation consistent. You can copy it directly or use the provided Unicode/escape forms in code.
Mathematical Italic Small R Symbol Meaning
π is the mathematical italic small version of the letter r: βMATHEMATICAL ITALIC SMALL Rβ at Unicode code point U+1D45F. In practice, itβs typically used as a math variable in typeset expressions, such as denoting a parameter, radius, rate, or an indexed quantityβdepending on the context of the equation or document. It differs visually from a regular βrβ because it follows mathematical font styling rules. Use it when you want your text, labels, or equation-like content to match the look of standard mathematical notation.
Common uses
- β’Writing math variables in documents and notes (e.g., for a parameter or function input).
- β’Labeling axes, legends, or annotations in charts that use math-style typography.
- β’Typing equation content in markdown, editors, or blog posts where consistent math styling matters.
- β’Using in UI text that displays mathematical notation (e.g., βrβ as a radius or rate).
- β’Programmatically generating math-styled strings for digital publications and templates.
Examples
π β Mathematical italic small r
- πThe value of π determines the model input.
- πCompute π from the given measurements.
- πIn the formula, π is treated as a variable.
- πAdjust π to change the radius.
- πLet π represent the rate in this section.
Variations
Ready to copy
Technical codes
| Unicode | U+1D45F | |
| HTML Entity | 𝑟 | |
| HTML Code | 𝑟 | |
| CSS | \1D45F |
FAQ
What does the Mathematical Italic Small R symbol mean?
π is the mathematical italic small version of the letter r: βMATHEMATICAL ITALIC SMALL Rβ at Unicode code point U+1D45F. In practice, itβs typically used as a math variable in typeset expressions, such as denoting a parameter, radius, rate, or an indexed quantityβdepending on the context of the equation or document. It differs visually from a regular βrβ because it follows mathematical font styling rules. Use it when you want your text, labels, or equation-like content to match the look of standard mathematical notation.
What Unicode character is π?
π is MATHEMATICAL ITALIC SMALL R with Unicode code point U+1D45F.
How do I copy π reliably?
Copy the character directly from this page. You can also use the Unicode escapes provided for programming environments.
Whatβs the difference between π and a normal βrβ?
They look different because π is a dedicated mathematical italic character, which matches math typography more closely than the plain Latin letter βrβ.
Can I use π in HTML or code?
Yes. The HTML entity is 𝑟. CSS escape is \\1D45F, and JavaScript escape is \\u{1D45F}.