Cube Root Calculator
Find the cube root of any number, including negative numbers. Shows exact results for perfect cubes and decimal approximation for others.
∛=
Cube Root Formula
∛x = x1/3
The cube root of a number x is the value y such that y × y × y = x. Unlike square roots, cube roots are defined for negative numbers.
Examples:
∛27 = 3 (because 3 × 3 × 3 = 27)
∛-8 = -2 (because -2 × -2 × -2 = -8)
∛64 = 4 (because 4 × 4 × 4 = 64)
∛27 = 3 (because 3 × 3 × 3 = 27)
∛-8 = -2 (because -2 × -2 × -2 = -8)
∛64 = 4 (because 4 × 4 × 4 = 64)
Perfect Cubes Reference
| Number | Cube Root |
|---|---|
| 1 | 1 |
| 8 | 2 |
| 27 | 3 |
| 64 | 4 |
| 125 | 5 |
| 216 | 6 |
| 343 | 7 |
| 512 | 8 |
| 729 | 9 |
| 1000 | 10 |
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Last updated: 2026-08-08