Fraction 1 by 9 (⅑) is the Unicode character at U+2151 in Number Forms. Official name: VULGAR FRACTION ONE NINTH. It is one precomposed fraction glyph — not the three characters 1/9.
Remember
Character ⅑
Unicode U+2151
Hex entity ⅑
Decimal ⅑
CSS escape \2151
Named entity (none)
Meaning vulgar fraction one ninth (1/9)
Not the same 1/9 (three chars) · ⅛ (1/8) · ⅒ (1/10)
Prefer ⅑ or ⅑ in HTML (no named form). You can also type ⅑ in a UTF-8 document.
Built with Hex: ⅑
Built with Decimal: ⅑
Built with CSS: ⅑
Typed: ⅑
Share: ⅑ of total
Math: 9 ⅑ = 1
How It Works
1. Hex:⅑ inserts code point U+2151 → ⅑.
2. Decimal: same code point as 8529 → ⅑. Same visual as hex.
3. CSS: use \2151 in content (not an HTML entity). #point::after appends ⅑.
4. Typed: paste ⅑ in a UTF-8 document when you need the one-ninth glyph as one character.
Pitfalls & Tips
Common mistakes when working with fraction 1 by 9.
Name
No named entity
There is no HTML5 named entity for U+2151. Use ⅑ or ⅑. Do not invent &frac19;.
1/9
Not three characters
Typing 1/9 creates three code points. ⅑ is one Number Forms character.
Neighbors
Not 1/8 or 1/10
One eighth is ⅛ (⅛). One tenth is ⅒. Match the code point your source requires.
Font
Font coverage
Some fonts omit rare vulgar fractions. If ⅑ is missing, fall back to 1/9 or a font with Number Forms coverage.
CSS vs HTML
Do not mix escapes
\2151 belongs in CSS strings. ⅑ / ⅑ belong in HTML.
a11y
Add accessible text
Screen readers may not announce ⅑ clearly. Prefer aria-label="one ninth" or nearby prose when the fraction carries meaning.
Semicolon
End references
Always finish entities with ; — write ⅑, not ⅑.
Compatibility
Browser Support
Fraction 1 by 9 (U+2151) and its entity forms (⅑, ⅑, CSS \\2151) are supported in all mainstream browsers. Visible glyphs depend on Number Forms font coverage.
✓ Universal support
Fraction 1 By 9 (⅑)
Encode with hex, decimal, CSS escape, or type the character — same code point everywhere encoding is supported.
100%Browser coverage
Google ChromeSupported
Yes
Microsoft EdgeSupported
Yes
Mozilla FirefoxSupported
Yes
Apple SafariSupported
Yes
OperaSupported
Yes
Internet ExplorerAll versions
Yes
U+2151Full support
Bottom line: Prefer ⅑ in HTML (no named form). Use ⅑ when decimal form is required, and \\2151 only inside CSS content.
Remember
Key Takeaways
Unicode: fraction 1 by 9 is U+2151 (decimal 8529) — glyph ⅑.
HTML: no named entity — use ⅑ / ⅑ / type ⅑.
CSS: use \2151 inside content for generated text.
Meaning: ⅑ ≠ 1/9 (three chars) ≠ ⅛ ≠ ⅒.
One line:U+2151 → ⅑ / ⅑ / CSS \2151 (no named form).
Frequently Asked Questions
Use ⅑ (hex), ⅑ (decimal), type ⅑ directly in UTF-8, or the CSS escape \2151 in content. There is no named HTML entity for U+2151.
U+2151 (VULGAR FRACTION ONE NINTH). Hex 2151, decimal 8529. It belongs to the Number Forms block (U+2150–U+218F).
No. HTML5 does not define a named entity for U+2151. Prefer ⅑ or ⅑. Nearby fractions like 1/8 do have named forms such as ⅛.
Use it when you need the single precomposed one-ninth glyph. Prefer typing 1/9 as three characters when your font lacks Number Forms coverage or when plain ASCII is required.
HTML numeric entities (⅑ or ⅑) go in markup. The CSS escape \2151 goes in stylesheet strings (usually content on ::before/::after).
No. U+2151 is one character (⅑). Typing 1/9 creates three characters: digit one, solidus, and digit nine.
🤔
Did you know?
Fraction 1 by 9 is Unicode U+2151 (decimal 8529) — glyph ⅑ (VULGAR FRACTION ONE NINTH) in Number Forms. There is no HTML5 named entity; use ⅑ or ⅑. It is one precomposed character, not 1/9 as three characters. Related fractions include one eighth (⅛) and one tenth (⅒).
