The square root of 27 is 5.19615242 (rounded to 8 decimal places).
The square root of 27 is 5.19615242 (rounded to 8 decimal places).
It is not a perfect square, so the root is irrational. In simplest radical form, √27 = 3√3, because 27 = 9 × 3.
27 lies between the perfect squares 25 (5²) and 36 (6²), so √27 is between 5 and 6. Our answer 5.19615242 fits that range.
You can check it by squaring the result: 5.19615242² ≈ 27.
| √27 | = 5.19615242 |
| 5.19615242² | = 27 |
| ∛27 | = 3 |
| Number | Square root | Note |
|---|---|---|
| 23 | 4.795832 | |
| 24 | 4.898979 | |
| 25 | 5 | perfect square |
| 26 | 5.09902 | |
| 27 | 5.196152 | this page |
| 28 | 5.291503 | |
| 29 | 5.385165 | |
| 30 | 5.477226 |
The square root of 27 is 5.19615242 (rounded to 8 decimal places).
No. The nearest perfect squares are 25 and 36.
Irrational. Its decimal never ends or repeats.
The cube root of 27 is about 3.
Yes. Use the calculator on this page, or open the full free Scientific Calculator with memory, history and keyboard support.