± Special characters
Maths · U+00B1
| Unicode | U+00B1 (177) |
|---|---|
| HTML entity | ± |
| Named entity | ± |
| CSS | content: "\00B1" |
| JavaScript | "\u00B1" |
| URL encoded | %C2%B1 |
| UTF-8 size | 2 bytes |
| Category | Maths |
Symbols for formulas. Most are not on the keyboard, so people copy them.
How to read this
- A Unicode code point is a name tag unique to each character. Different fonts, same number — still the same character.
- In HTML, the numeric form &#number; works everywhere. Named entities like ♥ read nicer but exist only for some characters.
- In CSS, use a backslash and hexadecimal: content: "\2764".
- If the character shows as a box, the copy did not fail — that font simply has no glyph for it. Another font will show it.
Frequently asked questions
Q. What is the Unicode code point of ±?
U+00B1, which is 177 in decimal. Stored as UTF-8 it takes 2 bytes.
Q. How do I write ± in HTML?
Use ± and every browser shows the same character. The named form ± also works.
Q. How do I use ± in CSS or JavaScript?
In CSS, content: "\00B1". In JavaScript, "\u00B1". In a URL it becomes %C2%B1.
Q. What kind of character is ±?
It belongs to the maths group. The rest of that group is listed further down this page, ready to copy.