Mathematical Italic Small R 𝑟
Visual Description: This symbol appears as a slender, slanted lowercase r. It is the math version of a regular r, styled in italics to mark variables. The shape is clean and compact, designed to sit beside numbers and operators. In diagrams and calculators, it blends with other symbols without drawing attention.
Meaning & Usage: In math, r often stands for a variable. It can denote a radius in geometry, a rate in equations, or a correlation coefficient in statistics. The italic form helps distinguish it from text letters and keeps equations readable on screens, papers, and quick UI displays.
Historical Background: Mathematical italic symbols grew from typesetting traditions that separate variables from ordinary text. The italic r was adopted to maintain a consistent look for letters that carry numeric meaning. Over time, math fonts and standard keyboards kept this form, so it appears in printed math and digital math tools.
Practical Use: In formulas and calculators, r appears in many contexts. It helps you express area and volume with simple formulas like A = π r^2 and C = 2π r. Quick UI controls such as sliders or input fields let you compare r with other values in real time.
See our category page for related symbols.
Look‑alikes: r (U+72).
Need styled alternatives? Try the Fancy Text tool.
Confusables
Technical details
- Codepoint:
U+1D45F - General Category:
Ll - Age:
3.1 - Bidi Class:
L - Decomposition:
<font> 0072 - Block:
Mathematical Alphanumeric Symbols - Script:
Common - UTF-8:
F0 9D 91 9F - UTF-16:
D835 DC5F - UTF-32:
0001D45F - HTML dec:
𝑟 - HTML hex:
𝑟 - JS escape:
\u{1D45F} - Python \N{}:
\N{MATHEMATICAL ITALIC SMALL R} - Python \U:
\U0001D45F - URL-encoded:
%F0%9D%91%9F - CSS escape:
\1D45F
How to type / insert
Fast copy: click the Copy button near the top of this page.
By codepoint: in many editors and IDEs, you can insert via the Unicode code U+1D45F or a built‑in character picker.
HTML: use the numeric entity 푟 (hex) or 푟 (decimal) when an HTML entity is needed.
Compatibility & troubleshooting
Font support: if the symbol does not render, the current font likely lacks this codepoint. Choose a font with broad Unicode coverage or allow a fallback font.
Web pages: ensure your CSS font stack includes a general fallback; avoid relying on images for common symbols to preserve accessibility and copyability.