Infinity ∞

∞ (U+221E) is a standard Unicode character that you can copy and paste anywhere text is accepted. This page provides a concise reference with safe tips, internal links, and practical guidance so you can use it reliably across apps and platforms.

What it is and where it’s used: Infinity is part of the Symbols family (block: Mathematical Operators). If you need styled or decorative alternatives, try our Fancy Text tool to generate compatible text that works in most modern interfaces.

History & usage: The symbol ∞ is the character for INFINITY. It sits in the Mathematical Operators block and belongs to the Common script category. In English text, it is described as INFINITY. The locale is en. Usage notes focus on how symbols appear in math and UI. - Common math symbols indicate operations or comparisons in formulas and user interfaces. In practice, designers show it to represent very large or unbounded ideas in formulas and in user interfaces. The symbol communicates a concept quickly without words. It works with limits, sums, and integrals as a visual cue, and it helps users recognize a boundless idea at a glance. People use it in teaching to point to ideas beyond finite numbers, and they use it in software to mark an option that does not have a fixed end. The character is a compact, distinct glyph that stays recognizable across fonts and sizes. In history and usage, it remains a clear, shared symbol for infinite quantity or process. The brief guidance keeps the focus on its role as a common symbol in formulas and interfaces.

Copy and input: the quickest method is to copy the character here. You can also insert it by its codepoint U+221E in many development tools or editors. Some operating systems provide a character viewer or input palette that lets you search by name or code and insert the glyph into documents.

Display and fallback: if you see an empty box (tofu) or a placeholder rectangle, the active font might not include this codepoint. Switching to a font with broader Unicode coverage or using a fallback font usually fixes the issue. On the web, ensure the page’s font stack includes a general‑purpose fallback.

Related references: browse the Categories for similar characters. When choosing a symbol, prefer the official codepoint for semantic clarity and better compatibility with search, copy, and accessibility tooling.

See our category page for related symbols.