Cube and Square Root Calculator
Enter any number to instantly see its square, square root, cube and cube root, including correct handling of negative inputs for the cube root.
Cube and Square Root Calculator
Calculates the square, square root, cube and cube root of a number in one step.
This all-in-one calculator returns four related values for a single input: the square (n²), the square root (√n), the cube (n³) and the cube root (∛n). Square roots of negative numbers aren't real, so those are shown as zero, but cube roots of negative numbers are perfectly real and the calculator computes them with the correct sign — something a naive power formula (n^(1/3)) usually gets wrong for negative n. Use it for quick algebra checks, engineering calculations, or verifying manual work.
Example
- With the default values shown above, this calculator returns: Square (n²) ≈ 729; Square Root (√n) — 0 if n is negative ≈ 5.1962; Cube (n³) ≈ 19683; Cube Root (∛n) ≈ 3.
Frequently Asked Questions
Why does the square root show 0 for a negative number?
Square roots of negative numbers aren't real numbers, so the calculator treats negative inputs as 0 for that result rather than showing an error.
Does the cube root work correctly for negative numbers?
Yes — unlike the square root, cube roots of negative numbers are real (e.g. the cube root of -27 is -3), and this calculator preserves that sign correctly.
Sources
- Standard formula, publicly documented method