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Get NordVPN →Square Root Calculator (√ and ∛)
A free online square root calculator that computes the square root (√) of a non-negative number and also shows its cube root (∛). Enter any value greater than or equal to zero and get accurate results immediately.
Enter a number (≥ 0) to see its square root and cube root.
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How it works
What is a square root?
The square root of a number x is the value that, when multiplied by itself, equals x. It is written with the radical symbol √. For example, √9 = 3 because 3 × 3 = 9.
In the real-number system, square roots are only defined for non-negative numbers, so this calculator requires a value of zero or greater.
Square root vs. cube root
The cube root (∛) of a number is the value that, used three times as a factor, returns the original number. For instance, ∛27 = 3 because 3 × 3 × 3 = 27.
This tool shows both roots at once so you can compare them and use whichever your problem needs.
Frequently asked questions
›Can I calculate the square root of a negative number?
No. Square roots of negative numbers are not real, so this calculator only accepts values of zero or greater.
›What is the square root of 0?
The square root of 0 is 0, because 0 × 0 = 0.
›Does this tool show the cube root too?
Yes. Alongside the square root (√), it also displays the cube root (∛) of the same number.
›How accurate are the results?
Results are computed with high precision and rounded for readability, which is accurate enough for most math and study needs.
›Is this calculator free to use?
Yes, it is completely free and runs directly in your browser with no sign-up required.
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