How to use the square root calculator
Enter any non-negative number and the square root is calculated instantly. To find a cube root, set Root Degree to 3. For a fourth root, set it to 4 — and so on for any nth root. Numbers whose root is a whole number are flagged as perfect squares/roots.
Square root reference
√1=1, √4=2, √9=3, √16=4, √25=5, √36=6, √49=7, √64=8, √81=9, √100=10. The square root of x is the number r such that r² = x. For nth roots: ⁿ√x = x^(1/n). The square root of a negative number is not a real number.
FAQ
What is a perfect square?
A perfect square is a whole number whose square root is also a whole number. Examples: 1, 4, 9, 16, 25, 36, 49, 64, 81, 100. The calculator flags these automatically.
How do I calculate a cube root?
Set the Root Degree to 3. The calculator then computes ³√x = x^(1/3). For example, the cube root of 27 is 3, because 3³ = 27.