Mathematical Bold Small C 𝐜

Visual Description: The character is a bold, lowercase c with a heavier stroke. It keeps the familiar curved shape but appears thicker and more uniform. It remains compact and readable at small sizes, suitable for formulas and labels in calculators and math editors.

Meaning & Usage: In math typography, bold letters highlight variables or vectors. A bold small c distinguishes the symbol from an italic variable. It can indicate a constant or a labeled quantity in formulas. In calculators and editors, bold c helps users spot a key variable during quick operations or comparisons.

Historical Background: Bold forms have long served to emphasize important variables in printed math. As digital typography grew, dedicated bold alphabets were created to keep these marks consistent across screens. The Mathematical Alphanumeric Symbols block provides bold variants for Latin letters. This made bold c accessible in formulas, editors, and apps.

Practical Use: In software, bold small c appears in formula editors and calculators to mark a variable or emphasized term. It helps separate constants from results when bold styling is toggled. UI controls may insert bold c, apply bold to results, or highlight it during comparisons and step-by-step calculations.

See our category page for related symbols.

Look‑alikes: c (U+63).

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