Plus-Minus Sign (±)
HTML entity for the plus-minus sign (±). Learn how to use ± or ± in HTML for tolerances, error margins, and mathematical notation.
Math
±
Plus-Minus Sign
All Formats
| Format | Value |
|---|---|
| Character | ± |
| HTML Entity | ± |
| HTML Code (Decimal) | ± |
| Unicode | U+00B1 |
| CSS Content | \00B1 |
| Category | Math |
About Plus-Minus Sign
The plus-minus sign (±) indicates that a value can be either added or subtracted, commonly used to express tolerances, error margins, and mathematical ranges. For example, "20 ± 5" means the value is between 15 and 25.
In HTML, insert this symbol using ±, ±, or ±. The named entity ± is part of the HTML 2.0 specification and has universal browser support. It is widely used in scientific papers, engineering specifications, and educational content.
The plus-minus sign is part of the Latin-1 Supplement Unicode block. It renders as a plus sign positioned directly above a minus sign. A related but less common symbol is the minus-plus sign (∓), which indicates the opposite operation in paired equations.
In CSS, use "\00B1" with the content property to insert this symbol via pseudo-elements. The plus-minus sign is commonly needed in web content about measurements, scientific data, statistical results, and manufacturing tolerances. It is accessible to screen readers, which typically announce it as "plus or minus."
Usage Examples
<!-- Using named entity -->
<p>This is the Plus-Minus Sign: ±</p>
<!-- Using numeric code -->
<p>This is the Plus-Minus Sign: ±</p>
<!-- Using the character directly (UTF-8) -->
<p>This is the Plus-Minus Sign: ±</p>
<!-- In CSS -->
.icon::before {
content: "\00B1";
}FAQ
What is the HTML entity for Plus-Minus Sign?
The Plus-Minus Sign (±) can be inserted using the named entity ±, the numeric code ±, or by pasting the character directly in a UTF-8 document.
How do I use ± in CSS?
In CSS, use the content property with the value "\00B1". For example: content: "\00B1";
What is the Unicode code point for Plus-Minus Sign?
The Unicode code point for Plus-Minus Sign is U+00B1. This is the universal identifier for this character across all platforms and programming languages.
Try It in the HTML Entity Tool
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