**The square root of 12 is 3.46, rounded to two decimal places.** The square root is written as 2 times the square root of 3, in its simplest form. The function may be performed on most calculators by hitting the square root button followed by 12.

Since 12 is equal to 4 times 3, the square root of 12 is equal to the square root of 4 times 3, which further reduces into the square root of 4 times the square root of 3. Since the square root of 4 is 2, the figure simplifies to 2 times the square root of 3, which is 1.73.