Mathematical Bold Small B 𝐛
Visual Description: The character is a lowercase b rendered in a bold mathematical style. The thick strokes give it weight on screens and in print. It keeps a clean, compact shape with rounded curves. It contrasts with ordinary letters when used in formulas and identifiers. It stands out in quick UI labels.
Meaning & Usage: This bold small B marks variables, coefficients, or special identifiers in math texts. It helps distinguish symbols from words and from plain numerals. In calculators and apps, it can indicate emphasis or a chosen value in a running equation. Keep it visually separated from normal text for clarity.
Historical Background: The idea of bold symbols grew with type design and digital fonts. Designers sought a way to stack emphasis on a single character without changing its meaning. Over time, bold variants became common in mathematical notation, aiding quick recognition in dense formulas and fast screens.
Practical Use: In practice, this glyph is a handy label in formulas and interfaces. Use a calculator or editor that supports bold math fonts to highlight a key variable. UI controls can toggle bold emphasis, show comparisons, or switch between normal and bold blocks for quick reading.
See our category page for related symbols.
Look‑alikes: b (U+62).
Need styled alternatives? Try the Fancy Text tool.
Confusables
Technical details
- Codepoint:
U+1D41B - General Category:
Ll - Age:
3.1 - Bidi Class:
L - Decomposition:
<font> 0062 - Block:
Mathematical Alphanumeric Symbols - Script:
Common - UTF-8:
F0 9D 90 9B - UTF-16:
D835 DC1B - UTF-32:
0001D41B - HTML dec:
𝐛 - HTML hex:
𝐛 - JS escape:
\u{1D41B} - Python \N{}:
\N{MATHEMATICAL BOLD SMALL B} - Python \U:
\U0001D41B - URL-encoded:
%F0%9D%90%9B - CSS escape:
\1D41B
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+1D41B or a built‑in character picker.
HTML: use the numeric entity 퐛 (hex) or 퐛 (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.