The square root of 4 is 2.
The square root of 4 is 2.
Because 2 × 2 = 4, 4 is a perfect square and its root is a whole number.
You can check it by squaring the result: 2² ≈ 4.
| √4 | = 2 |
| 2² | = 4 |
| ∛4 | = 1.587401 |
| Number | Square root | Note |
|---|---|---|
| 2 | 1.414214 | |
| 3 | 1.732051 | |
| 4 | 2 | this page |
| 5 | 2.236068 | |
| 6 | 2.44949 | |
| 7 | 2.645751 | |
| 8 | 2.828427 | |
| 9 | 3 | perfect square |
The square root of 4 is 2.
Yes. 2 × 2 = 4.
Rational, because it is the whole number 2.
The cube root of 4 is about 1.587401.
Yes. Use the calculator on this page, or open the full free Scientific Calculator with memory, history and keyboard support.