HTML Entity for Asymptotically Equal To (≃)

Beginner

5 min read

Updated: Sep 2026

1 example

Unicode U+2243

HTML Entity for asymptotically equal to (≃) tutorial illustration

Definition

What Is Asymptotically Equal To?

Asymptotically equal to (≃) is Unicode U+2243 in the Mathematical Operators block. It marks when two expressions behave the same in a limit (for example as x tends to infinity). HTML provides the named entity &sime;.

Remember

Character     ≃
Unicode       U+2243
Hex entity    &#x2243;
Decimal       &#8771;
Named entity  &sime;
CSS escape    \2243
Not the same  ≅ U+2245 · ≈ U+2248 · ≐ U+2250

All of these produce the same glyph: ≃. Prefer &sime; in hand-written HTML; type ≃ in UTF-8 when you can; use numeric or CSS forms for generated content.

Reference

Quick Reference

One table for every form you will actually use.

Form	Code	Where it goes
Direct character	`≃`	HTML text (UTF-8)
Named entity	`&sime;`	HTML markup (preferred name)
Hex entity	`≃`	HTML markup
Decimal entity	`≃`	HTML markup
CSS escape	`\2243`	Stylesheet `content`

When to Use Which

Situation	Use
Asymptotic equality (limit / growth)	`&sime;` or type `≃`
Approximately equal / congruent-style	≅ (U+2245) / `&cong;`
Almost equal (informal ≈)	≈ (U+2248) / `≈`
Approaches the limit	≐ (U+2250)
Generated text via `::before` / `::after`	`content: "\2243"`

See it

Live Preview

Asymptotically-equal-to symbol in common study contexts.

Inline math f(x) ≃ g(x)

Large glyph ≃

With limit cue f(x) ≃ g(x) as x → ∞

vs. related operators ≃ asymptotic · ≅ approx · ≈ almost

With entities Named: ≃ | Hex: ≃ | Decimal: ≃

Code

Complete HTML Example

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

Hex + Decimal + Named + CSS + Typed

Five ways to produce ≃ in a single document.

html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Asymptotically Equal To (≃) in HTML</title>
  <style>
    #point::after {
      content: "\2243";
    }
  </style>
</head>
<body>
  <p>Asymptotically equal using Hex Code: &#x2243;</p>
  <p>Asymptotically equal using HTML Code: &#8771;</p>
  <p>Asymptotically equal using Named Entity: &sime;</p>
  <p id="point">Asymptotically equal using CSS Entity: </p>
  <p>Typed directly: ≃</p>
</body>
</html>

Try It Yourself

How It Works

1. Hex: U+2243 → ≃ in HTML. The browser turns it into ≃.

2. Decimal: same code point as 8771 → ≃. Same result as hex.

3. Named: &sime; is the standard HTML name for U+2243 — clear in source.

4. CSS: use \2243 in content (not an HTML entity). #point::after appends that ≃ after the paragraph text.

5. Typed ≃: fine in UTF-8 source. All five lines show the same glyph.

Pitfalls & Tips

Common mistakes when working with asymptotically equal to (≃).

≅

Not approximately equal

≃ is asymptotic. For approx / congruent-style use ≅ (&cong;).

≈

Not almost equal

For informal “about equal” use ≈ (≈).

Define

State the limit

Say what variable tends to (for example x → ∞) when you first introduce ≃.

CSS vs HTML

Do not mix escapes

\2243 belongs in CSS. &sime; / ≃ belong in HTML.

Fonts

Use math-capable fonts

Some UI fonts omit Mathematical Operators. Prefer fonts with solid math coverage.

Semicolon

End references

Always finish with ; — write &sime;, not &sime.

Compatibility

Browser Support

Asymptotically equal to (U+2243) and its entity forms (&sime;, ≃, ≃, CSS \\2243) are supported in all mainstream browsers. Glyph availability depends on font support for Mathematical Operators.

✓ Universal support

Asymptotically Equal To (≃)

Type ≃, or encode with named, hex, decimal, or CSS escape — same glyph everywhere encoding is supported.

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+2243 / entities Full support

Bottom line: Prefer &sime; or a typed ≃ for normal text. Use numeric forms when generating markup, and \\2243 only inside CSS content.

Remember

Key Takeaways

Unicode: asymptotically equal to is U+2243 (decimal 8771).
HTML: prefer &sime; (or ≃ / ≃).
CSS: use \2243 inside content for generated text.
Watch out: ≃ ≠ ≅ ≠ ≈.

One line: U+2243 → &sime; / ≃ / ≃ / CSS \2243.

Frequently Asked Questions

How do I display asymptotically equal to (≃) in HTML?

Use ≃ (hex), ≃ (decimal), &sime; (named), or the CSS escape \2243 in the content property. All render ≃. You can also paste ≃ directly if your file is UTF-8.

What is the Unicode value for asymptotically equal to?

U+2243 (hex 2243, decimal 8771). Unicode names it ASYMPTOTICALLY EQUAL TO. It belongs to the Mathematical Operators block.

Is there a named HTML entity for ≃ (U+2243)?

Yes. &sime; maps to U+2243. Prefer it in hand-written HTML; numeric forms are useful in generated markup.

How is ≃ different from ≅ or ≈?

≃ (U+2243) is asymptotically equal. ≅ (U+2245, &cong;) is approximately equal / congruent-style. ≈ (U+2248, ≈) is almost equal. They are different code points — do not substitute blindly.

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

HTML entities (≃, ≃, or &sime;) go in markup. The CSS escape \2243 is used in stylesheets (usually in the content property of ::before/::after). Both render ≃.

When should I use asymptotically equal to?

When your notation means two expressions behave the same in a limit (for example as x → ∞). Define the asymptotic sense in words for beginners.

Did you know?

Asymptotically equal to is Unicode U+2243 (decimal 8771) in the Mathematical Operators block — official name ASYMPTOTICALLY EQUAL TO. HTML’s named reference is &sime;. It is not the same as approximately equal (U+2245 ≅) or almost equal (U+2248 ≈).

Next: At Symbol

Learn the HTML entity for the at symbol (@).

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Mari Selvan M P 🔗

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