Here we will define, analyze, simplify, and calculate the square root of 16. We start off with the definition and then answer some common questions about the square root of 16. Then, we will show you different ways of calculating the square root of 16 with and without a computer or calculator. We have a lot of information to share, so let’s get started!

Square root of 16 definition

The square root of 16 in mathematical form is written with the radical sign like this √16. We call this the square root of 16 in radical form. The square root of 16 is a quantity (q) that when multiplied by itself will equal 16.

√16 = q × q = q2

Is 16 a perfect square?

16 is a perfect square if the square root of 16 equals a whole number. As we have calculated further down on this page, the square root of 16 is a whole number.

16 is a perfect square.

Is the square root of 16 rational or irrational?

The square root of 16 is a rational number if 16 is a perfect square. It is an irrational number if it is not a perfect square. Since 16 is a perfect square, it is rational number. This means that the answer to “the square root of 16?” will have no decimals.

√16 is a rational number

Can the square root of 16 be simplified?

A square root of a perfect square can be simplified because the square root of a perfect square will equal a whole number:

√16 = 4

How to calculate the square root of 16 with a calculator

The easiest and most boring way to calculate the square root of 16 is to use your calculator! Simply type in 16 followed by √x to get the answer. We did that with our calculator and got the following answer:

√16 = 4

How to calculate the square root of 16 with a computer

If you are using a computer that has Excel or Numbers, then you can enter SQRT(16) in a cell to get the square root of 16. Below is the result we got:

SQRT(16) = 4

What is the square root of 16 written with an exponent?

All square roots can be converted to a number (base) with a fractional exponent. The square root of 16 is no exception. Here is the rule and the answer to “the square root of 16 converted to a base with an exponent?”:

√b = b½

√16 = 16½

How to find the square root of 16 by long division method

Here we will show you how to calculate the square root of 16 using the long division method. This is the lost art of how they calculated the square root of 16 by hand before modern technology was invented.

Step 1)

Set up 16 in pairs of two digits from right to left:

16 |

Step 2)

Starting with the first set: the largest perfect square less than or equal to 16 is 16, and the square root of 16 is 4. Therefore, put 4 on top and 16 at the bottom like this:

4 |

16 |

16 |

The difference between the bottom two numbers is zero, therefore, you are done! The answer is the green number on top. Once again, the square root of 16 is 4.

Square Root of a Number

Please enter another number in the box below to get the square root of the number and other detailed information like you got for 16 on this page.

Notes

Remember that negative times negative equals positive. Thus, the square root of 16 does not only have the positive answer that we have explained above, but also the negative counterpart.

We often refer to perfect square roots on this page. You may want to use the list of perfect squares for reference.

Square Root of 17

Here is the next number on our list that we have equally detailed square root information about.

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