Cube Root Calculator

Cube Root Calculator

Find the principal cube root of any number, including negative and positive values, with our Cube Root Calculator. It also determines the imaginary cube roots.
Tip: Press
share icon
to embed for free

Understanding cube roots is essential for anyone dealing with mathematics, whether in academia, professional fields, or everyday life. In this comprehensive guide, we will explore the concept of cube roots, delve into the mathematics behind them, solve them, and introduce an invaluable tool to solve them: the cube root calculator. This tool simplifies the process of finding cube roots, making it accessible to students, professionals, and hobbyists alike.

A playful and colorful widescreen image for a blog header themed around a Cube Root Calculator, using dark blue colors.

What is a Cube Root?

In mathematics, the cube root of a number is defined as the fraction of the number that, when cubed (multiplied by itself three times), yields the original number. For example, the cube root of 27 is 3 because 3×3×3=27. This operation is the inverse of cubing a number.

Symbol and Notation

The exact cube root part of a number 𝑥x is denoted as ³√𝑥​. This notation is used in mathematical expressions and can also be input into our cube root calculator for quick calculations.

How Does the Cube Root Calculator Work?

Step-by-Step Usage

  1. Input the Number: Enter the number for which you want to find the cube root into the calculator’s input field.
  2. Calculate: Click the “Calculate” button to process the input.
  3. View Results: The calculator displays the cube root of the given number in the output field. If the number is a perfect cube, it will display an integer; otherwise, it will show a decimal approximation.

Detailed Examples of Cube Roots

Example 1: Cube Root of a Perfect Cube

  • Number: 64
  • Cube Root: ³√64​=4

Calculation: Since 4×4×4=64, the cube root of 64 is 4.

Example 2: Cube Root of a Non-Perfect Cube

  • Number: 10
  • Cube Root: ³√​≈2.154

Calculation note: 10 is not a perfect cube, and its cube root does not result in an integer. The calculator approximates it to three decimal places.

Understanding Cube Root Calculations

Perfect Cubes

A perfect cube is a number that can be expressed as the cube of an integer. Examples include:

  • 8=2³
  • 27=3³
  • 125=5³

Perfect cubes are important because their cube roots are integers, which are easier to understand, write and visualize.

Cube Roots of Negative Numbers

The cube root of a negative number is the negative of the cube root of the corresponding positive number. For example:

  • ³√-27=−3 because (−3)×(−3)×(−3)=−27

Practical Applications of Cube Roots

Cube roots are not just academic; they have practical applications in various fields:

  • Geometry and Architecture: Calculating the dimensions of cubes and cuboid structures.
  • Physics and Engineering: Determining the volume and density of materials.
  • Everyday Problems: Figuring out storage requirements or container sizes.

Real-Life Example of Using Cube Roots

Example: Estimating Container Sizes

If a company needs to store 512 cubic feet of goods and wants to use a cubical storage container, the side length of the cubed root container can be calculated using the cube root:

  • ³√512=8 feet per side


The cube root calculator is free online tool, a powerful tool that simplifies the process of finding cube roots. Whether you are a student, a professional, or just curious about mathematics, understanding how to calculate cube roots and their applications can greatly enhance your numerical literacy. This guide provides you with the knowledge, method, and tools to tackle any challenge involving cube roots, making complex calculations straightforward and accessible.

Frequently Asked Questions

What is a cube root?

A cube root of a number is defined as a value that, when cubed (multiplied by itself three times), returns the original number. For instance, the cube root of given number 27 is 3 because 3×3×3=27. Cube roots can apply to both positive and negative numbers, or digits, making them versatile in various mathematical calculations.

How can I calculate the cube root of a number using your cube root calculator?

To find the cube root using our root calculator, simply enter the given number into the input field and press the "Calculate" button. The calculator will quickly display the formula for the cube root, providing both exact solutions and approximate values depending on whether the number is a perfect cube.

What is the difference between cube roots and square roots?

Cube roots and the square root of roots are similar in that they both involve finding a number that produces a specific result when raised to a power (cubed or squared, respectively). However, while the square root of roots are concerned with finding a number that produces the original number when multiplied by itself once, cube roots involve multiplication of the number three times. Our tool focuses on cube roots, but understanding both concepts is beneficial for comprehensive mathematical knowledge.

Can the cube root calculator find cube roots of negative numbers?

Yes, the cube root calculator can determine the cube root of negative numbers. For example, the cube root of -27 is the exact cube root of -3, as (−3)×(−3)×(−3)=−27. This feature is particularly useful because it respects the mathematical property that cube roots of real numbers can indeed be negative.

How does the calculator handle non-perfect cubes?

When you enter a non-perfect cube into the form of the cube root calculator, it computes an answer using an approximate decimal value of the cube root. Non-perfect cubes do not have integer cube roots, so the calculator provides a precise decimal answer to help users understand the approximate value of the cube root.

What is meant by the "nth root," and does your calculator support nth root calculations?

The nth root of a number refers to a value that, when raised to the power of n, results in the original number. While our focus here is on cube roots (which are a special case of nth roots where n=3), understanding general nth roots can be beneficial for broader mathematical contexts. Our specific nth root using tool is designed for cube roots, but an nth root calculator might be useful for more general needs.

How accurate is the cube root calculator?

Our cube root calculator is designed to provide highly accurate results for both perfect and non-perfect cubes. For perfect cubes, it will return the exact integer cube root. For non-perfect cubes, it calculates a precise decimal approximation, ensuring users have reliable answer information for their mathematical queries.

autor image
Alize Mendez
Published on
Apr 29, 2024

A quick and easy way OF
sharing measurements online

 Create sizing templates in seconds and run your business like a pro

Visit Sizely


ebay logo white etsy logo whiteposhmark logoshpock logo whitetradesy logo whiteofferup logo whitevaragesale logo whiteletgo logo whitesarousell logo white