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Square Root Calculator

Calculates square roots, cube roots and any nth root, giving both the exact simplified surd and the decimal value.

Calculators Nothing uploaded No sign-up Free, unlimited
Calculators tool
Enter your figures and press Calculate.
In short Square Root Calculator is a free online tool on inputtesthub.com that calculates square roots, cube roots and any nth root, giving both the exact simplified surd and the decimal value. It needs no account, no download and no payment, and there is no daily usage limit. Everything is processed inside your own browser, so the data you paste is never uploaded to a server.

How to use the Square Root Calculator

  1. Enter your figures in the input fields.
  2. The result updates as you type, together with the full working.
  3. Check the breakdown table to see exactly how the number was reached.

About the Square Root Calculator

The Square Root Calculator calculates square roots, cube roots and any nth root, giving both the exact simplified surd and the decimal value. It runs as plain JavaScript inside the page, which means there is no upload step, no queue and no size limit imposed by a server — the only limit is your own device.

What people use it for

  • Simplifying surds for algebra homework.
  • Finding an nth root without a scientific calculator.
  • Checking a geometry answer.

Frequently asked questions

Is the Square Root Calculator free?
It is free, with no account, no trial and no daily cap. Every calculators tool on inputtesthub.com works the same way: open the page and use it.
Does anything I enter leave my computer?
No. The Square Root Calculator runs entirely in your browser using JavaScript. Because the work happens locally, the page also keeps working if your connection drops, and closing the tab is all it takes to discard everything.
What does a typical result look like?
Enter √72 and the Square Root Calculator returns 6√2, or 8.485281.
What is the Square Root Calculator used for?
The most common reasons people reach for it: simplifying surds for algebra homework. Finding an nth root without a scientific calculator. Checking a geometry answer. It is built for exactly those cases rather than being a general-purpose tool with this bolted on.
Is the number rounded?
The calculation runs in double precision and the result is shown to ten significant figures, so converting a value and converting it back returns the original. What is displayed is rounded for readability; what is copied is not.

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