What number multiplied by itself equals 128?

Here we will answer: What number multiplied by itself gives 128? In other words, what number times itself will equal 128?

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 = 128
x ≈ 11.314

Square Root Method:
Take the square root of 128 to get the answer:

√128 ≈ 11.314

Exponent Method:
Make the base 128 and the exponent 0.5 to get the answer:

128^0.5 ≈ 11.314

There you go! Now you know how to calculate "What number multiplied by itself equals 128?"

The bottom line is that 11.314 times itself equals approximately 128 as illustrated here:

11.314 x 11.314 ≈ 128

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