Cube Root Calculator
Enter any number below to instantly get its cube root.
∛27
3
What Is a Cube Root?
The cube root of a number n is the value x such that x³ = n. It's the inverse operation of cubing a number.
Worked example
Find the cube root of 64.
4 × 4 × 4 = 64
∛64 = 4
Frequently Asked Questions
What is a cube root?
The cube root of a number is the value that, multiplied by itself three times, gives that number. The cube root of 27 is 3, since 3 × 3 × 3 = 27.
Can you take the cube root of a negative number?
Yes — unlike square roots, cube roots of negative numbers are real. The cube root of −8 is −2, since (−2) × (−2) × (−2) = −8.
How is a cube root different from a square root?
A square root undoes squaring (raising to the 2nd power); a cube root undoes cubing (raising to the 3rd power). Every positive number has one real cube root, while it has two square roots (one positive, one negative).
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