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How to Type Cubed Root in Calculator

Reviewed by Calculator Editorial Team

Learn how to properly input the cubed root symbol in calculators on different operating systems. This guide covers Windows, Mac, and mobile devices with clear instructions and examples.

Keyboard Shortcuts

The cubed root symbol (∛) can be typed using keyboard shortcuts on most operating systems. Here are the most common methods:

∛ = Alt + 251 (Windows)

∛ = Option + R (Mac)

Windows Instructions

  1. Press and hold the Alt key
  2. Type 251 on the numeric keypad
  3. Release the Alt key

Mac Instructions

  1. Press and hold the Option key
  2. Type R
  3. Release the Option key

Note: If the symbol doesn't appear, your keyboard may not support these shortcuts. In that case, try copying the symbol from this page or using the character map tool.

Formula Examples

The cubed root of a number x is the value that, when multiplied by itself three times, gives x. Mathematically:

∛x = y

where y³ = x

Example Calculation

Let's find the cubed root of 27:

  1. Type: 27 ∛ =
  2. The calculator should display: 3

Verification: 3 × 3 × 3 = 27, which confirms our calculation.

Decimal Example

For 125.763:

  1. Type: 125.763 ∛ =
  2. The calculator should display approximately: 5.01

Verification: 5.01 × 5.01 × 5.01 ≈ 125.763

Troubleshooting

If you're having trouble typing the cubed root symbol, try these solutions:

Symbol Doesn't Appear

  • Check if your calculator supports the symbol
  • Try using the character map tool (Windows) or keyboard viewer (Mac)
  • Copy the symbol from this page and paste it into your calculator

Calculator Doesn't Recognize the Symbol

  • Ensure your calculator is in the correct mode (scientific or engineering)
  • Try using the caret symbol (^) for exponentiation: x^(1/3)
  • Check if your calculator has a dedicated cubed root function

Mobile Device Issues

  • Try using a different keyboard layout
  • Check if your device supports the symbol
  • Consider using a calculator app that supports advanced symbols

FAQ

Can I use the caret symbol (^) for cubed root?

Yes, you can use x^(1/3) as an alternative to the cubed root symbol. This works in most scientific calculators.

Why isn't the cubed root symbol working on my calculator?

This could be due to several reasons: your calculator might not support the symbol, you might be in the wrong mode, or the symbol might not be available on your keyboard layout. Try the alternative methods mentioned in this guide.

Is there a dedicated cubed root button on calculators?

Some scientific calculators have a dedicated cubed root button, often labeled as x³√ or similar. Check your calculator's manual for specific instructions.

Can I use the cubed root symbol in all calculator apps?

The cubed root symbol may not work in all calculator apps, especially basic ones. For universal compatibility, consider using the exponentiation method (x^(1/3)).