What number multiplied by itself equals 40?

Here we will answer: What number multiplied by itself gives 40? In other words, what number times itself will equal 40?

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 = 40
x ≈ 6.325

Square Root Method:
Take the square root of 40 to get the answer:

√40 ≈ 6.325

Exponent Method:
Make the base 40 and the exponent 0.5 to get the answer:

40^0.5 ≈ 6.325

There you go! Now you know how to calculate "What number multiplied by itself equals 40?"

The bottom line is that 6.325 times itself equals approximately 40 as illustrated here:

6.325 x 6.325 ≈ 40

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