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RootLab
∛n and n³ together.
Every real number has exactly one real cube root, including negatives — (−2)³ = −8, so ∛−8 = −2. This is different from square roots, which fail for negative inputs.
Cube roots reverse volume calculations — given a cube's volume, this finds its side length, useful for sizing containers or reverse-engineering dimensions from capacity.
Cube root
3
∛n
What you entered
Take the cube root
∛27= 3Check: cube it back
3³= 27Result
Cube root: 3
The cube root of 27 is 3.