Square Root Calculator
Calculate the square root of a number.
Runs locally in your browser
Your inputs are processed locally in your browser and are not uploaded or stored by us.
The Square Root Calculator is a real-number square-root calculator that finds the principal square root of any finite non-negative number.
How to calculate a square root
- Enter a non-negative real number in the input field.
- Click "Calculate" to determine its principal square root.
Square Root Formula
result = √x
This calculator operates only in the real-number domain. Negative values do not have a real square root, so negative inputs are rejected because this version does not calculate complex-number roots.
Calculating √2
Number2
result = √2
Result: ≈ 1.414213562...
Notes
- The tool accepts x ≥ 0 and finite values only. Examples: √4 = 2, √2.25 = 1.5, √0 = 0.
- JavaScript floating-point arithmetic is used, so some non-integer results may be approximate.
- Your inputs are processed locally in your browser and are not uploaded or stored by us.