U+3399 "㎙" Square Fm Unicode Character
Unicode Version 17.0
㎙
U+3399 "㎙" Square Fm is a single character representing the abbreviation for the square femtometer, a unit of area equal to 10 to the power of negative 30 square meters. This character is encoded in the CJK Compatibility block of the Unicode standard, which includes precomposed square forms of various units, symbols, and abbreviations commonly used in East Asian text contexts. Its purpose is to allow the compact display of this metric unit in a single character, particularly for use in scientific, technical, and typographic applications where space or alignment is a concern.
General Properties
| Code Point | U+3399 |
| Version Added | 1.1 |
| Name | Square Fm |
| Unicode 1.0 Name | Squared Fm |
| Block | CJK Compatibility |
| General Category | Other Symbol |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Left To Right |
| Decomposition Type | Square |
| Decomposition Mapping | "f" U+0066 Latin Small Letter F "m" U+006D Latin Small Letter M |
Encodings
| HTML Decimal Encoding | ㎙ |
| HTML Hex Encoding | ㎙ |
| UTF-8 Encoding | 0xE3 0x8E 0x99 |
| UTF-16 Encoding | 0x3399 |
| UTF-32 Encoding | 0x00003399 |
| C/C++/Java Escape | \u3399 |
Unicode Properties
| NFC Quick Check | Yes |
| NFD Quick Check | Yes |
| Numeric Type | None |
| Numeric Value | NaN |
| Line Break | Ideographic |
| East Asian Width | Wide |
| Changes When NFKC Casefolded | Yes |
| NFKC Casefold | "f" U+0066 Latin Small Letter F "m" U+006D Latin Small Letter M |
| NFKC Simple Casefold | "f" U+0066 Latin Small Letter F "m" U+006D Latin Small Letter M |
| Script | Common |
| Script Extensions | Common |
| Indic Syllabic Category | Other |
| Vertical Orientation | Upright |
| Grapheme Base | Yes |
| Grapheme Cluster Break | Other |
| Word Break | Other |
| Sentence Break | Other |