U+2163 "Ⅳ" Roman Numeral Four Unicode Character
Unicode Version 17.0
Ⅳ
U+2163 "Ⅳ" Roman Numeral Four is part of the Number Forms block, specifically the precomposed Roman numeral symbols, and represents the number four using the classic Roman notation of "I" before "V" to indicate subtraction (five minus one). Unlike a simple sequence of two separate uppercase letters, this single codepoint is intended for use in contexts where Roman numerals should maintain consistent typographic spacing and alignment, such as in clock faces, lists, or formal outlines. Its inclusion in Unicode allows digital text to accurately and portably represent this numeral without relying on font-specific ligatures or manual spacing adjustments.
General Properties
| Code Point | U+2163 |
| Version Added | 1.1 |
| Name | Roman Numeral Four |
| Block | Number Forms |
| General Category | Letter Number |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Left To Right |
| Decomposition Type | Compat |
| Decomposition Mapping | "I" U+0049 Latin Capital Letter I "V" U+0056 Latin Capital Letter V |
Encodings
| HTML Decimal Encoding | Ⅳ |
| HTML Hex Encoding | Ⅳ |
| UTF-8 Encoding | 0xE2 0x85 0xA3 |
| UTF-16 Encoding | 0x2163 |
| UTF-32 Encoding | 0x00002163 |
| C/C++/Java Escape | \u2163 |
Unicode Properties
| NFC Quick Check | Yes |
| NFD Quick Check | Yes |
| Numeric Type | Numeric |
| Numeric Value | 4 |
| Line Break | Ambiguous (Alphabetic or Ideographic) |
| East Asian Width | Ambiguous |
| Uppercase | Yes |
| Other Uppercase | Yes |
| Simple Lowercase Code Point | "ⅳ" U+2173 Small Roman Numeral Four |
| Lowercase Code Point | "ⅳ" U+2173 Small Roman Numeral Four |
| Simple Case Folding | "ⅳ" U+2173 Small Roman Numeral Four |
| Case Folding | "ⅳ" U+2173 Small Roman Numeral Four |
| Cased | Yes |
| Changes When Casefolded | Yes |
| Changes When Casemapped | Yes |
| Changes When Lowercased | Yes |
| Changes When NFKC Casefolded | Yes |
| NFKC Casefold | "i" U+0069 Latin Small Letter I "v" U+0076 Latin Small Letter V |
| NFKC Simple Casefold | "i" U+0069 Latin Small Letter I "v" U+0076 Latin Small Letter V |
| Script | Latin |
| Script Extensions | Latin |
| Indic Syllabic Category | Other |
| ID Start | Yes |
| XID Start | Yes |
| ID Continue | Yes |
| XID Continue | Yes |
| Alphabetic | Yes |
| Vertical Orientation | Upright |
| Grapheme Base | Yes |
| Grapheme Cluster Break | Other |
| Word Break | Alphabetic letter |
| Sentence Break | Upper |