HTML Entity for Intersection (∩)

Beginner

6 min read

Updated: Sep 2026

1 example

Unicode U+2229

HTML Entity for Intersection (∩) tutorial illustration

Definition

What Is the Intersection Entity?

Intersection (∩) is the Mathematical Operators character at Unicode U+2229 (INTERSECTION). In set theory, A ∩ B is the set of elements common to both A and B.

Remember

Character     ∩
Unicode       U+2229
Hex entity    &#x2229;
Decimal       &#8745;
Named entity  &cap;
CSS escape    \2229

All of these produce the same glyph: ∩. Prefer ∩ in HTML source for clarity; use hex/decimal when generating entities, and CSS \2229 only in content.

Reference

Quick Reference

One table for every form you will actually use.

Form	Code	Where it goes
Named entity	`∩`	HTML markup (best default)
Hex entity	`∩`	HTML markup
Decimal entity	`∩`	HTML markup
CSS escape	`\2229`	Stylesheet `content`
Direct character	`∩`	UTF-8 HTML text

When to Use Which

Situation	Use
Readable set-theory HTML source	`∩`
Need a numeric entity in HTML	`∩` or `∩`
Generated text via `::before` / `::after`	`content: "\2229"`
UTF-8 page, typing is easy	Type `∩` directly
Union of sets (∪)	`∪` / `U+222A` — different character

See it

Live Preview

Intersection rendered in common set-theory contexts.

Set notation A ∩ B = elements in both

Large glyph ∩

Probability P(A ∩ B)

vs union A ∩ B | A ∪ B

With entities Hex: ∩ | Decimal: ∩ | Named: ∩

Code

Complete HTML Example

One page that shows Intersection with the hex entity, decimal entity, named entity, and CSS escape. Use View Output or open the live editor.

Hex + Decimal + Named + CSS

All four ways to produce ∩ in a single document.

html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Intersection (∩) in HTML</title>
  <style>
    #point::after {
      content: "\2229";
    }
  </style>
</head>
<body>
  <p>Intersection using Hex Code: &#x2229;</p>
  <p>Intersection using HTML Code: &#8745;</p>
  <p>Intersection using Named Entity: &cap;</p>
  <p id="point">Intersection using CSS Entity: </p>
</body>
</html>

Try It Yourself

How It Works

1. Hex: U+2229 → ∩ in HTML. The browser turns it into ∩.

2. Decimal: same code point as 8745 → ∩. Same result as hex.

3. Named: ∩ is the HTML5 name for this character — easiest to read in source.

4. CSS: use \2229 in content (not an HTML entity). #point::after appends that ∩ after the paragraph text.

Pitfalls & Tips

Common mistakes when working with the Intersection symbol.

Named

Prefer ∩

Named form is clearer than numeric codes in hand-written HTML.

CSS vs HTML

Do not mix escapes

\2229 belongs in CSS. ∩ / ∩ / ∩ belong in HTML.

∩ vs ∪

Cap vs cup

∩ is intersection (∩). ∪ is union (∪) — opposite operation.

Logic

Not logical AND

Set ∩ is not the same as logical ∧ (U+2227). Use the operator that matches your meaning.

Semicolon

End references

Always finish with ; — write ∩, not &cap.

Fonts

Math Operators support

Use fonts that include U+2229 (most modern UI and math fonts do).

Compatibility

Browser Support

Intersection (U+2229) and its entity forms (∩, ∩, ∩, CSS \\2229) are supported in all mainstream browsers.

✓ Universal support

Intersection (∩)

Use ∩, or encode with hex, decimal, or CSS escape — same glyph everywhere.

100% Browser coverage

Google Chrome Supported

Yes

Microsoft Edge Supported

Yes

Mozilla Firefox Supported

Yes

Apple Safari Supported

Yes

Opera Supported

Yes

Internet Explorer All versions

Yes

U+2229 / entities Full support

Bottom line: Prefer ∩ in HTML for readability. Use ∩ or ∩ when encoding must be numeric, and \\2229 only inside CSS content.

Remember

Key Takeaways

Unicode: Intersection is U+2229 (decimal 8745).
HTML: prefer ∩, or use ∩ / ∩.
CSS: use \2229 inside content for generated text.
Use case: set intersection — remember ∪ is union (∪).

One line: U+2229 → ∩ / ∩ / ∩ / CSS \2229.

Frequently Asked Questions

How do I display the Intersection symbol (∩) in HTML using entities?

Use ∩ (named), ∩ (hex), ∩ (decimal), or the CSS escape \2229 in the content property. All render the Intersection symbol (∩).

What is the Unicode value for Intersection?

U+2229 (INTERSECTION). Hex 2229, decimal 8745. It belongs to the Mathematical Operators block.

Is there a named HTML entity for Intersection?

Yes. ∩ is the named HTML5 entity for ∩ and is supported in all modern browsers.

When should I use the Intersection HTML entity?

Use it in set theory, Venn diagrams, probability (P(A ∩ B)), and math docs. Prefer ∩ for readable source, or numeric forms when generating markup.

What is the difference between HTML code and CSS entity for ∩?

HTML entities (∩, ∩, or ∩) go in markup. The CSS escape \2229 is used in stylesheets (usually in the content property of ::before/::after). Both render ∩.

Is ∩ the same as Union (∪)?

No. ∩ is intersection (∩, U+2229) — elements in both sets. ∪ is union (∪, U+222A) — elements in either set.

Did you know?

Intersection is Unicode U+2229 (decimal 8745). HTML5 provides the named entity ∩ — prefer it for readable set-theory markup. Union is ∪ (∪, U+222A).

Next: Inverted Breve

Learn the HTML entity for the Inverted Breve combining mark — next in this entity sequence.

Inverted Breve tutorial →

About the author

Mari Selvan M P 🔗

Developer, cloud engineer, and technical writer

Experience 12 years building web and cloud systems
Focus Full Stack Development, AWS, and Developer Education

I write practical tutorials so students and working developers can learn by doing—from databases and APIs to deployment on AWS.

AWS Certified Developer – Associate (Credly)

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