Square root of 81
The square root of 81 is 9, because 9 Ć 9 = 81.
Square root of 81
Pick any whole number from 1 to 10,000.
How to work it out
- 1
The square root of 81 is the number that multiplied by itself gives 81.
- 2
9 Ć 9 = 81, so 81 is a perfect square.
Squares around 81
| Number | Squared |
|---|---|
| 8 | 64 |
| 9 | 81 |
| 10 | 100 |
| 11 | 121 |
Questions
What is the square root of 81?
The square root of 81 is 9, because 9 Ć 9 = 81.
Is 81 a perfect square?
Yes, 9 Ć 9 = 81.
What is 81 squared?
81 Ć 81 = 6561.
What is the square root of 81 rounded to 2 decimals?
9.