U+00B5 "µ" Micro Sign Unicode Character
U+00B5 "µ" Micro Sign is a typographical symbol representing the SI prefix micro, meaning one millionth (10⁻⁶), and is visually identical to the Greek letter mu (μ). It is widely used in scientific and engineering contexts, particularly in measurements of length (micrometers), mass (micrograms), and time (microseconds), as well as in chemistry and biology for notations like µg (microgram) or µL (microliter). Despite its visual similarity to the Greek mu, it is encoded as a distinct character to ensure consistent representation in digital text across different systems and applications. This character is part of the C1 Controls and Latin-1 Supplement block and is commonly found in technical documents, spreadsheets, and programming environments where precise unit notation is required.
General Properties
| Code Point | U+00B5 |
| Version Added | 1.1 |
| Name | Micro Sign |
| Block | Latin-1 Supplement |
| General Category | Lowercase Letter |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Left To Right |
| Decomposition Type | Compat |
| Decomposition Mapping | "μ" U+03BC Greek Small Letter Mu |
Encodings
| HTML Decimal Encoding | µ |
| HTML Hex Encoding | µ |
| UTF-8 Encoding | 0xC2 0xB5 |
| UTF-16 Encoding | 0x00B5 |
| UTF-32 Encoding | 0x000000B5 |
| C/C++/Java Escape | \u00b5 |
Unicode Properties
| NFC Quick Check | Yes |
| NFD Quick Check | Yes |
| Numeric Type | None |
| Numeric Value | NaN |
| Line Break | Alphabetic |
| Lowercase | Yes |
| Simple Uppercase Code Point | "Μ" U+039C Greek Capital Letter Mu |
| Simple Titlecase Code Point | "Μ" U+039C Greek Capital Letter Mu |
| Uppercase Code Point | "Μ" U+039C Greek Capital Letter Mu |
| Titlecase Code Point | "Μ" U+039C Greek Capital Letter Mu |
| Simple Case Folding | "μ" U+03BC Greek Small Letter Mu |
| Case Folding | "μ" U+03BC Greek Small Letter Mu |
| Cased | Yes |
| Changes When Casefolded | Yes |
| Changes When Casemapped | Yes |
| Changes When NFKC Casefolded | Yes |
| Changes When Titlecased | Yes |
| Changes When Uppercased | Yes |
| NFKC Casefold | "μ" U+03BC Greek Small Letter Mu |
| NFKC Simple Casefold | "μ" U+03BC Greek Small Letter Mu |
| Script | Common |
| Script Extensions | Common |
| Indic Syllabic Category | Other |
| ID Start | Yes |
| XID Start | Yes |
| ID Continue | Yes |
| XID Continue | Yes |
| Alphabetic | Yes |
| Vertical Orientation | Rotated |
| Grapheme Base | Yes |
| Grapheme Cluster Break | Other |
| Word Break | Alphabetic letter |
| Sentence Break | Lower |