# Square Root Calculator

This is just a quick and easy online square root calculator. Just enter a number on the left and click the calculator button to get your answer.

Enter your number, on the left side, in place of the X and click the "Calcuate Square Root" button. Your answer will appear on the right hand side. The squre root result may be longer than the text box so don't manually copy the answer from the box.

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### >Square Root Info

Here are some miscellaneous facts about the square root. The check mark symbol for square root is called the "Radical" symbol.

This symbol was first seen in printed form in a paper by Christoph Rudolff back in 1525. As far as we know, the idea itself of square root was probably first expressed by the ancient Babylonians.

In mathematics, a square root of a number a is a number y such that y2 = a; in other words, a number y whose square (the result of multiplying the number by itself, or y⋅y) is a. For example, 4 and −4 are square roots of 16 because 42 = (−4)2 = 16. Every nonnegative real number a has a unique nonnegative square root, called the principal square root, which is denoted by √a, where √ is called the radical sign or radix. For example, the principal square root of 9 is 3, which is denoted by √9 = 3, because 32 = 3 • 3 = 9 and 3 is nonnegative. The term (or number) whose square root is being considered is known as the radicand. The radicand is the number or expression underneath the radical sign, in this example 9