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Calculator Preferences
Square Root Calculator Sign
Square Root Calculator

This calculator is handy for quickly calculating square roots. Plus, if the radicand is not a perfect square, the calculator will list the nearest perfect squares that are greater and less than the radicand. The Learn tab includes answers to:

  • What are square roots?
  • What are perfect squares?
Learn More

Selected Data Record:

A Data Record is a set of calculator entries that are stored in your web browser's Local Storage. If a Data Record is currently selected in the "Data" tab, this line will list the name you gave to that data record. If no data record is selected, or you have no entries stored for this calculator, the line will display "None".

DataData recordData recordSelected data record: None


Enter the radicand (the number you are trying to find the square root of), which can be any number greater than or equal to zero. The radicand is the number inside the radical sign (√), whereas the index is located to the left and above the radical sign. If you wish to find the square root of a fraction, enter the fraction into the mini conversion calculator and I will convert it to a decimal and enter it into the radicand field for you.

Convert Fraction to Decimal
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Square roots:

This is result of the square root calculation. If the result is a lengthy decimal number the result is most likely an approximation. In any case the result always represents two square roots (one positive and one negative).

If you would like to save the current entries to the secure database, tap or click on the Data tab, select "New Data Record", give the data record a name, then tap or click the Save button. To save changes to previously saved entries, simply tap the Save button. Please select and "Clear" any data records you no longer need.

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Help and Tools

Help and Tools:

This section, which you can Unstick or Hide in the Calculator Preferences (just above the top of the calculator), contains the following tabs (content too long to fit within bordered frame can be scrolled up and down):

About: Click this tab for an introduction to the calculator.

Instructions: Click this tab for step-by-step instructions for using the calculator.

Terms: Click this tab for a list of the descriptions that are located within each popup help button (info icons).

PCalc: Click this tab for a handy "pocket" calculator you can use when you need to calculate an entry needed for the calculator.

Data: Click this tab to save a set of entries or a note in between visits. Entries and notes will be stored to your web browser's local storage (if supported by your browser of choice), meaning they can only be recalled with the same device and web browser you were using when you saved them. If you'd like to save entries and notes between devices you can do so by subscribing to the Ad-Free Member Version.



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