Cube Root Calculator
The cube root reverses cubing and is defined for positive, zero and negative real numbers.
How to use this calculator
- Enter any finite real number. The result includes a cube-back check to show the rounded root.
- Check the labels and units before using a result outside this page.
- Change one input at a time if you want to compare scenarios.
Formula and method
y = ∛x, meaning y³ = x
- y = ∛x, meaning y³ = x
- The displayed result is rounded; use more precision for values that must be exact.
Worked examples
Worked example
Find the cube root of −125.
(−5)³ = −125, so ∛(−125) = −5.
(−5)³ = −125, so ∛(−125) = −5.
Understanding the result
The cube root reverses cubing and is defined for positive, zero and negative real numbers.
The displayed result is rounded; use more precision for values that must be exact.
Important notes
The displayed result is rounded; use more precision for values that must be exact.
Displayed outputs are rounded for readability; preserve full precision when continuing a calculation.
Frequently asked questions
What does this cube root calculator show?
The cube root reverses cubing and is defined for positive, zero and negative real numbers.
Which inputs should I check first?
Enter any finite real number. The result includes a cube-back check to show the rounded root.
Can the result be used as a final professional specification?
The displayed result is rounded; use more precision for values that must be exact.
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- Pythagorean Theorem Calculator — Find the hypotenuse of a right triangle from the two perpendicular sides.
Related explanations
Learn the method behind the number or compare the terminology before using the calculator.
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This page provides a calculation tool plus explanatory information so you can understand what the result means and when the underlying method may not fit your situation.