What number multiplied by itself equals 813?

Here we will answer: What number multiplied by itself gives 813? In other words, what number times itself will equal 813?

We have identified many different ways of getting the answer to this question:

Algebra Method:
Make an algebra equation and solve for x:

x • x = 813
x ≈ 28.513

Square Root Method:
Take the square root of 813 to get the answer:

√813 ≈ 28.513

Exponent Method:
Make the base 813 and the exponent 0.5 to get the answer:

813^0.5 ≈ 28.513

There you go! Now you know how to calculate "What number multiplied by itself equals 813?"

The bottom line is that 28.513 times itself equals approximately 813 as illustrated here:

28.513 x 28.513 ≈ 813

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The answer on this page is rounded to the nearest thousandth, if necessary.