Cube root calculator
Compute ∛x for volume-back-of-envelope checks and algebra exercises—negative inputs keep a real root.
Client3
Nearby workflows on Toolcore
- Nth root calculator — Compute x^(1/n)—cube roots and higher real roots, including odd roots of negatives, locally. when units or numeric output should be checked on a related calculator.
- Square root calculator — Principal square root of a non-negative number—browser-only radical helper. when units or numeric output should be checked on a related calculator.
- Math expression evaluator — Evaluate basic + − × ÷ arithmetic with parentheses in your browser—no variables. when units or numeric output should be checked on a related calculator.
- Quadratic equation solver — Solve ax² + bx + c = 0 with discriminant—real or complex roots, computed in your browser. when units or numeric output should be checked on a related calculator.
Common use cases
- Solve x³ = k for side length when k is a perfect cube.
- Verify cube-root steps in precalculus homework.
Common mistakes to avoid
Complex roots
Only real cube roots are returned—no complex output.
FAQ
Negative numbers?
∛(−8) = −2 in the real numbers.
vs nth-root?
Use nth-root when the index is not 3.
More tools
Related utilities you can open in another tab—mostly client-side.
Nth root calculator
ClientCompute x^(1/n)—cube roots and higher real roots, including odd roots of negatives, locally.
Square root calculator
ClientPrincipal square root of a non-negative number—browser-only radical helper.
Math expression evaluator
ClientEvaluate basic + − × ÷ arithmetic with parentheses in your browser—no variables.
Quadratic equation solver
ClientSolve ax² + bx + c = 0 with discriminant—real or complex roots, computed in your browser.