Superscript Zero (⁰) is the Unicode character at U+2070 in the Subscripts and Superscripts block. It looks like a small raised 0 and appears in power notation such as x⁰ and 10⁰.
Remember
Character ⁰
Unicode U+2070
Hex entity ⁰
Decimal ⁰
CSS escape \2070
Named entity (none)
All of these produce the same glyph: ⁰. Prefer the Unicode character (or its entities) when you need that exact glyph; use <sup>0</sup> when you want semantic superscript formatting instead.
Reference
Quick Reference
One table for every form you will actually use.
Form
Code
Where it goes
Direct character
⁰
HTML text (UTF-8)
Hex entity
⁰
HTML markup
Decimal entity
⁰
HTML markup
CSS escape
\2070
Stylesheet content
Named entity
—
Not defined in HTML5
Semantic tag
<sup>0</sup>
HTML (formatting, not the ⁰ glyph)
When to use which
Situation
Use
Need the Unicode glyph ⁰
Type ⁰, or ⁰ / ⁰
Generated text via ::before / ::after
content: "\2070"
Semantic superscript for any text
<sup>0</sup>
Plain digit zero (not superscript)
Type 0 (U+0030)
Looking for &sup0; or similar
Does not exist — use numeric form
See it
Live Preview
Superscript Zero rendered in common writing contexts.
Inline textExponent rule: x⁰ = 1 (for x ≠ 0)
Large glyph⁰
In a power10⁰ = 1
Monospacex⁰ → 1
With entitiesHex: ⁰ | Decimal: ⁰
Semantic <sup>x0 (tag styles digit 0)
Code
Complete HTML Example
One page that shows Superscript Zero with the hex entity, decimal entity, CSS escape, and the semantic <sup> option. Use View Output or open the live editor.
Hex + Decimal + CSS + <sup>
Four ways to show a raised zero in a single document.
html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Superscript Zero (⁰) in HTML</title>
<style>
#point::after {
content: "\2070";
}
</style>
</head>
<body>
<p>Superscript Zero using Hex Code: ⁰</p>
<p>Superscript Zero using HTML Code: ⁰</p>
<p id="point">Superscript Zero using CSS Entity: </p>
<p>Semantic alternative: x<sup>0</sup></p>
</body>
</html>
Superscript Zero using Hex Code: ⁰
Superscript Zero using HTML Code: ⁰
Superscript Zero using CSS Entity: ⁰
Semantic alternative: x⁰
How It Works
1. Hex:U+2070 → ⁰ in HTML. The browser turns it into ⁰.
2. Decimal: same code point as 8304 → ⁰. Same result as hex.
3. CSS: use \2070 in content (not an HTML entity). #point::after appends that ⁰ after the paragraph text.
4. Semantic <sup>:x<sup>0</sup> styles digit zero as a superscript. Prefer this when you need meaning, not a specific Unicode glyph.
Pitfalls & Tips
Common mistakes when working with Superscript Zero entities.
Named?
No named entity
HTML5 does not define &sup0; or similar. Use numeric forms.
CSS vs HTML
Do not mix escapes
\2070 belongs in CSS. ⁰ / ⁰ belong in HTML.
⁰ vs 0
Different characters
⁰ is U+2070; digit 0 is U+0030. Do not treat them as the same.
Glyph vs tag
Choose intentionally
Use the Unicode glyph for exact look; use <sup> for semantic superscript on any text.
Semicolon
End references
Always finish with ; — write ⁰, not ⁰.
Fonts
Check the glyph
Some fonts draw ⁰ weakly. If appearance matters, test the font or prefer <sup>.
Compatibility
Browser Support
Superscript Zero (U+2070) and its numeric entity forms (⁰, ⁰, CSS \\2070) are supported in all mainstream browsers. Glyph shape depends on the font.
✓ Universal support
Superscript Zero (⁰)
Encode with hex, decimal, or CSS escape — or use <sup> for semantic formatting.
100%Browser coverage
Google ChromeSupported
Yes
Microsoft EdgeSupported
Yes
Mozilla FirefoxSupported
Yes
Apple SafariSupported
Yes
OperaSupported
Yes
Internet ExplorerAll versions
Yes
U+2070 / entitiesFull support
Bottom line: Use ⁰ or ⁰ for the Unicode glyph, \\2070 only inside CSS content, and <sup>0</sup> when you want semantic superscript.
Remember
Key Takeaways
Unicode: Superscript Zero is U+2070 (decimal 8304).
HTML: use ⁰ or ⁰ when you need an entity.
CSS: use \2070 inside content for generated text.
Alternative: use <sup>0</sup> for semantic superscript formatting.
One line:U+2070 → ⁰ / ⁰ / CSS \2070, or semantic <sup>0</sup>.
Frequently Asked Questions
Use ⁰ (hex), ⁰ (decimal), or the CSS escape \2070 in the content property. All render ⁰. You can also paste the character ⁰ directly when your file is UTF-8.
U+2070 (hex 2070, decimal 8304). It belongs to the Subscripts and Superscripts Unicode block.
No. HTML5 does not define a named entity for ⁰. Use numeric references like ⁰ or ⁰.
Use ⁰ (or its entities) when you need the exact Unicode superscript glyph. Use <sup>0</sup> when you want semantic superscript formatting for arbitrary text.
No. Digit zero is U+0030. Superscript Zero is U+2070 — a different character with a different code point.
HTML entities (⁰ or ⁰) go in markup. The CSS escape \2070 is used in stylesheets (usually in the content property of ::before/::after). Both render ⁰.
🤔
Did you know?
Superscript zero is Unicode U+2070 (decimal 8304). HTML5 has no named entity for it — use ⁰ or ⁰. It is a different character from digit zero (U+0030).
