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Cube Root Calculator
∛x — real cube root of any number.
Enter values to see your result
Frequently asked questions
Can a negative have a cube root?
Yes, unlike square root. ∛−8 = −2. Odd roots preserve sign.
Perfect cubes?
1, 8, 27, 64, 125, 216, 343, 512, 729, 1000.
How to compute by hand?
Prime factorization: break x into factors, group triplets. For non-integers, Newton's method.
Why does computer show tiny error?
Floating point — pow(27, 1/3) returns 2.9999999... due to representation limits. Rounding handles it.