Cube Number Calculator
Calculate x³ with step-by-step solution, perfect cube check, and nearby cubes table.
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Why it's called a "cube"
5 × 5 × 5 = 125 unit cubesFormulas
Cube: x³ = x × x × x
Inverse: ³√(x³) = x
- x³
- The number multiplied by itself three times. Preserves sign: (−a)³ = −a³.
- Perfect cube
- An integer whose cube root is an integer (…, −27, −8, −1, 0, 1, 8, 27, 64, 125, …).
- ³√n
- The inverse — given n, finds the unique real value whose cube is n. Defined for all reals (including negatives).
- Volume
- A cube with side x has volume x³. Doubling the side multiplies volume by 8, tripling by 27.