Square root of 400
The square root of 400 is 20, because 20 Ć 20 = 400.
Square root of 400
Pick any whole number from 1 to 10,000.
How to work it out
- 1
The square root of 400 is the number that multiplied by itself gives 400.
- 2
20 Ć 20 = 400, so 400 is a perfect square.
Squares around 400
| Number | Squared |
|---|---|
| 19 | 361 |
| 20 | 400 |
| 21 | 441 |
| 22 | 484 |
Questions
What is the square root of 400?
The square root of 400 is 20, because 20 Ć 20 = 400.
Is 400 a perfect square?
Yes, 20 Ć 20 = 400.
What is 400 squared?
400 Ć 400 = 160000.
What is the square root of 400 rounded to 2 decimals?
20.