U+221B
Cube root∛
Cube root is a monochrome text character from the Unicode Mathematical Operators block, listed here under Math. Copy it with one click, or use the hex, octal, decimal and HTML entity codes below to embed it in web pages, code, and documents.
Quick facts
- Unicode
- U+221B
- Decimal
- 8731
- Hex
- 0x221B
- Octal
- 0o21033
Unicode identity
| Format | Value | Copy |
|---|---|---|
| Code pointOfficial Unicode notation | U+221B | |
| Official nameUnicodeData.txt, Unicode 18.0.0 | CUBE ROOT | |
| DecimalBase 10 | 8731 | |
| HexadecimalBase 16 | 0x221B | |
| OctalBase 8 | 0o21033 | |
| BinaryBase 2 | 0010001000011011 | |
| General categorySymbol, math | Sm | |
| Unicode blockU+2200–U+22FF | Mathematical Operators | |
| Plane | Basic Multilingual Plane (BMP, Plane 0) |
HTML & CSS
| Format | Value | Copy |
|---|---|---|
| HTML entity (decimal) | ∛ | |
| HTML entity (hex) | ∛ | |
| CSS content escapeUse inside content: "…" | \221B | |
| URL encodedPercent-encoded UTF-8 | %E2%88%9B |
Programming languages
| Format | Value | Copy |
|---|---|---|
| JavaScript / TypeScript | \u221B | |
| JSONUTF-16 surrogate pairs | \u221B | |
| Python | \u221B | |
| Java / C# / Kotlin | \u221B |
Byte encodings
| Format | Value | Copy |
|---|---|---|
| UTF-83 bytes | E2 88 9B | |
| UTF-16 (BE) | 221B | |
| UTF-32 (BE) | 0000221B |
How to type Cube root
Windows
Hold Alt and type +221B with the hex numeric keypad option enabled, or type 221B then press Alt+X in Word and most Office apps.
macOS
Enable the Unicode Hex Input keyboard, hold Option, and type 221B. Or open Character Viewer (Control+Command+Space) and search "Cube root".
Linux
Press Ctrl+Shift+U, type 221b, then press Space or Enter in GTK apps. IBus and most terminals support the same sequence.
HTML, CSS & code
Paste the character directly, or use the escapes above: ∛ in HTML, \221B in CSS, and \u221B in JavaScript.
Official Unicode reference
- Character name
- CUBE ROOT
- Block
- Mathematical Operators (U+2200–U+22FF)
- General category
- Sm — Symbol, math
Data from the Unicode Character Database, version 18.0.0. See the official code chart for the Mathematical Operators block: U2200.pdf (PDF, unicode.org).
Frequently asked questions
How do I copy the Cube root symbol?
Click the Copy button at the top of this page, or select ∛ and press Ctrl+C (Cmd+C on Mac). It is plain Unicode text, so it pastes into documents, chats, code, and design tools.
What is the Unicode code point for Cube root?
Cube root is U+221B (decimal 8731, hexadecimal 0x221B, octal 0o21033). It lives in the Mathematical Operators block (U+2200–U+22FF) of the Basic Multilingual Plane (BMP, Plane 0).
What is the official Unicode name of Cube root?
The Unicode Standard (version 18.0.0) names this character "CUBE ROOT". Its General_Category is Sm (Symbol, math).
What is the HTML code for Cube root?
Use ∛ or ∛. In CSS, use content: "\221B".
How do I type Cube root in code?
JavaScript: "\u221B". Python: "\u221B". JSON and Java: "\u221B". The UTF-8 byte sequence is E2 88 9B.
Is Cube root an emoji?
No. Cube root is a text symbol and renders as a monochrome glyph in the current font. Some platforms may offer an emoji variant when U+FE0F is appended.