√144 = 12. The square root of 144 is 12, because 12 × 12 = 144. 144 is a perfect square.
√144 at a glance.
Value
12
Rounded
12
Perfect square?
Yes
144 squared
20,736
Checking it in your head
A perfect square's root is a whole number, so check by multiplying back: 12 × 12 = 144. Its last digit fits too: squares only ever end in 0, 1, 4, 5, 6 or 9, and 12² ends in 4.
Frequently asked questions
What is the square root of 144?
The square root of 144 is 12, because 12 × 12 = 144. 144 is a perfect square.