Square Root Calculator
Calculate square roots with precision and find perfect squares
Calculate Square Root
Enter a number to find its square root
Result
Square root calculation and analysis
Enter a number to calculate its square root
Perfect Squares Reference
Common perfect squares for quick reference
1²
1
2²
4
3²
9
4²
16
5²
25
6²
36
7²
49
8²
64
9²
81
10²
100
11²
121
12²
144
13²
169
14²
196
15²
225
16²
256
17²
289
18²
324
19²
361
20²
400
How Square Root Calculation Works
What is a Square Root?
The square root of a number is a value that, when multiplied by itself, gives the original number. For example, √25 = 5 because 5 × 5 = 25.
Perfect Squares
A perfect square is a number that is the square of an integer. Examples: 1, 4, 9, 16, 25, 36, 49, 64, 81, 100...