Square Root Calculator
CalculatorA square root calculator finds the real value that produces the input when squared.
What is it
A square root is a value x where x² = a. Positive numbers have positive and negative square roots, but calculators usually return the principal positive root.
√a = x, where x² = a
How to use
- 1Enter the value.
- 2Press calculate.
- 3Check the square root and verification expression.
Reference
| Input | Square root |
|---|---|
| 144 | 12 |
| 2 | 1.414214 |
Sources & standards
- MDN Web Docs: Client-side web APIs - MDN Web Docs
FAQ
What is the square root of 144?
Because 12 × 12 = 144, the principal square root of 144 is 12.
Does this calculate square roots of negative numbers?
The current tool shows real-number square roots only and explains that negative values are not defined in real numbers.