Find the square root of any number instantly — perfect for geometry, physics, statistics or just checking if a number is a perfect square.
Informational calculator only. Verify important outputs independently before legal, tax, medical, engineering, safety-critical, contractual, employment, or compliance use.
Enter job values, review the estimate, then use the decision hints before ordering or quoting.
Enter a non-negative number
√x = y where y² = xThe principal (positive) square root is the value y that, when multiplied by itself, gives x. Each positive number has two square roots: +y and -y.
For perfect squares (1, 4, 9, 16, 25. ), result is exact integer
When you need quick formula verification before copying a result into notes around root mean square.
This cube root calculator helps when value are already known and you want the cube root quickly.
Next: digital root.
The principal square root (positive) is the default. The negative root is -√x.
Results in imaginary number (i√|x|). This calculator shows "undefined" for negative inputs.