Almost Equal To ≈

The Almost Equal To character (≈) is a standard HTML entity defined in the HTML specification. In HTML source code, it can be written using the named entity reference ≈, the decimal numeric character reference ≈, or the hexadecimal numeric reference ≈. The character is assigned Unicode code point U+2248 in the Universal Character Set.

The almost-equal-to symbol (double tilde) indicates approximate equality between two values. It is widely used in scientific and engineering contexts where exact equality is not expected but the values are sufficiently close. The symbol consists of two wavy lines stacked vertically.

Mathematical HTML entities enable web authors to display proper mathematical notation without relying on images or specialized rendering libraries like MathJax or KaTeX. While complex equations and multi-line formulas may still benefit from dedicated math typesetting tools, individual symbols expressed as HTML entities render quickly, remain accessible to screen readers, and can be styled with CSS just like regular text content.

When deciding how to encode the Almost Equal To character in your HTML documents, the named entity ≈ is generally the most readable choice for developers reviewing or maintaining source code. The decimal form ≈ and hexadecimal form ≈ are equally valid alternatives that work in contexts where named entities may not be supported, or when generating HTML output programmatically from server-side code. All three representations produce identical visual output in every modern web browser.

Use the almost-equal symbol in scientific approximations (π ≈ 3.14159), engineering estimates, statistical results, and any context where values are close but not exactly equal. It is the most commonly used approximation symbol and is understood across all scientific disciplines.