Cube Root Calculator
Calculate the real cube root of positive or negative numbers.
How to use
- Enter any finite real number.
- Calculate to view the cube root and result³ verification.
Capabilities and scope
The runner evaluates ∛x and also shows the cube of the result as a check.
How it works
It uses JavaScript Math.cbrt, so negative inputs retain a real cube root.
Example
Entering −27 returns −3, and the check gives (−3)³ = −27.
Useful for
- Recover a linear scale from a cubic volume
- Check the real root of a cubic relationship
Before you use it
- Floating-point inputs can show small rounding differences in displayed digits.
Frequently asked questions
Can I enter a negative number?
Yes. A negative number has a real cube root.