Mathematical Bold Italic Capital K 𝑲

Visual Description: In this font, the character is a bold, italic uppercase K with thick strokes and a compact footprint. It tilts slightly, giving a sense of motion. The lines are clean and strong, easy to read beside other symbols. It stands out in formulas and labeled diagrams.

Meaning & Usage: K is a versatile symbol in math and science. It often stands for a constant, a coefficient, or a generic quantity. In physics it can denote energy or stiffness, depending on context. In software, K labels a parameter that users can adjust quickly during design.

Historical Background: The letter K has long appeared in many alphabets and mathematical traditions. The bold italic style is a modern typographic choice that helps distinguish variables from other symbols. This form is common in textbooks, software, and notes to reduce confusion on crowded pages.

Practical Use: In formulas you may see A = K · t or K appears as a coefficient in a relation. In graphs or spreadsheets, K can control scale, tolerance, or slope. In calculators and math apps, you enter K as a constant, then adjust it with sliders or quick inputs.

See our category page for related symbols.

Look‑alikes: K (U+4B).

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