Typing a cube root symbol on a computer is straightforward once you know the right shortcuts and tools. This guide walks through several practical methods that work across different operating systems and software environments.
Whether you are writing a math report, designing a formula in a spreadsheet, or preparing slides for a presentation, you can insert the cube root expression cleanly and consistently.
| Platform | Shortcut | Menu Path | Notes |
|---|---|---|---|
| Windows (Office) | Alt + 8730 | Insert > Symbol > More Symbols | Unicode code point 221B |
| Windows (Equation Editor) | Alt + '=' then type √ | Equation tools Design > Radical | Allows custom index for cube root |
| macOS | Control + Command + Space | Edit > Emoji & Symbols | Open Character Viewer and search 'cube root' | Google Docs | Insert > Equation > Radical | Add placeholder for index and radicand | Use keyboard to navigate inside the radical |
| Web and Code (LaTeX) | \sqrt[3]{x} | Math editors or Markdown with MathJax | Common in technical documents and forums |
Using Alt Codes and Character Map on Windows
On Windows, the quickest way to type a cube root symbol without third‑party tools relies on built‑in utilities. Alt codes and the Character Map provide reliable access to the radical symbol.
Alt Code Method
Press and hold the Alt key, type 8730 on the numeric keypad, and then release Alt. This shortcut inserts the cube root symbol ∛ directly into any application that accepts Unicode input.
Character Map Approach
Open Character Map from the Start menu, locate the cube root symbol, select it, and choose Copy. Then paste it into your document, spreadsheet, or slide as needed.
Entering Cube Roots in Google Docs and Word
Word processors like Google Docs and Microsoft Word include equation tools that make typesetting radicals clean and flexible. These equation editors support custom indices, so you can clearly show cube roots and higher‑order radicals.
Google Docs Equation Toolbar
Choose Insert > Equation, then click Radical and select the cube root template. Click the square root placeholder to type the index 3 and the radicand, keeping the expression readable and professionally aligned.
Microsoft Word Equation Tools
Place your cursor where the radical should appear, select Insert > Equation, and choose the radical style. Modify the index to 3 and enter the expression under the radical to match standard mathematical notation.
Keyboard Shortcuts on macOS
macOS users can access the cube root symbol through the Character Viewer, an emoji and symbol picker integrated into the system. This method is consistent across most applications, from Pages to web browsers.
Use the keyboard shortcut Control + Command + Space to open the Character Viewer. Search for cube root, select the symbol, and insert it directly into your text.
Writing Cube Roots in Code, LaTeX, and Web Forms
Developers, mathematicians, and technical writers often need to type cube root expressions in plain code, markup, or online editors. LaTeX and similar systems provide precise control over layout and appearance.
LaTeX and Markdown with MathJax
In LaTeX, use the command \sqrt[3]{x} to generate a cube root. Markdown editors that support MathJax or KaTeX render this syntax cleanly, making it ideal for technical blogs, documentation, and academic notes.
Plain Text and Programming Languages
When a symbolic radical is not supported, writers may use text such as cbrt(x) or ^(1/3) to describe cube roots. These linear forms are common in coding challenges, spreadsheet formulas, and plain‑text explanations.
Key Takeaways for Typing Cube Roots on Computer
- Alt + 8730 works on Windows for quick insertion of ∛
- macOS offers Character Viewer via Control + Command + Space
- Google Docs and Word equation tools support customizable radical templates
- LaTeX and Markdown with MathJax provide precise control for technical documents
- Use linear forms like cbrt(x) when symbols are not supported
FAQ
Reader questions
What is the fastest way to type a cube root on Windows?
Press and hold Alt, type 8730 on the numeric keypad, and release Alt to insert ∛ directly.
How do I insert a cube root in Google Docs without an equation editor toolbar?
Use the keyboard shortcut Control + Command + Space on macOS to open Character Viewer, search for the cube root symbol, copy it, and paste it into Google Docs.
Can I use a cube root symbol in Excel cells?
Yes, you can insert the symbol via Insert > Symbol, use Alt + 8730 if your keyboard has a numeric pad, or keep the expression in plain text such as cbrt(x) alongside the numeric value.
How do I type a cube root in LaTeX math mode?
Write \sqrt[3]{expression} to produce a cube root with a clear index of 3 over the radical sign.