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Calculate square roots with precision and find perfect squares
Enter a number to calculate its square root
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
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.
A perfect square is a number that is the square of an integer. Examples: 1, 4, 9, 16, 25, 36, 49, 64, 81, 100...