HTML Entity for Roman Numeral One (Ⅰ)

What Is the Roman Numeral One Entity?

Roman Numeral One (Ⅰ) is the Unicode character at U+2160 in the Number Forms block. It looks like an uppercase roman I and is used for chapter labels, outlines, and formal numbering.

Character     Ⅰ
Unicode       U+2160
Hex entity    Ⅰ
Decimal       Ⅰ
CSS escape    \2160
Named entity  (none)

All of these produce the same glyph: Ⅰ. Prefer the Unicode character (or its entities) when you need a true roman numeral; type the letter I when you only need ordinary text.

Quick Reference

One table for every form you will actually use.

When to use which

Live Preview

Roman Numeral One rendered in common writing contexts.

Complete HTML Example

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

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Roman Numeral One (Ⅰ) in HTML</title>
  <style>
    #point::after {
      content: "\2160";
    }
  </style>
</head>
<body>
  <p>Roman Numeral One using Hex Code: &#x2160;</p>
  <p>Roman Numeral One using HTML Code: &#8544;</p>
  <p id="point">Roman Numeral One using CSS Entity: </p>
  <p>Typed directly: Ⅰ</p>
</body>
</html>

Roman Numeral One using Hex Code: Ⅰ
Roman Numeral One using HTML Code: Ⅰ
Roman Numeral One using CSS Entity: Ⅰ
Typed directly: Ⅰ

Key Takeaways