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How to Use Excel TAN Function?

TAN FunctionPin
TAN Function

Microsoft Excel is a powerful data visualization and analysis program used all around the world. It uses spreadsheets to store, organize, or perform operations with formulas and functions. This application is developed for WindowsMacAndroid, and iOS. The TAN function is a Mathematical function to calculate the tangent of the angle of the triangle.

In this tutorial, we will guide you to know how to use Excel TAN Function. Get an official version of MS Excel from the following link:

Excel TAN FunctionPin
Excel TAN Function

Explanation of TAN Function

  • It is one of the built-in functions in Microsoft Excel.
  • The TAN function returns the tangent of the angle of the triangle.


  • Here, you will see the syntax of the TAN function.
  • To apply this function on your spreadsheet, you have to select a cell and enter the formula in the following format.
  • Once you enter the formula, just click on the Enter button to get the result.


Argument Explanation:

Number – The angle in radians to which you need to find the tangent value.


Here, we come up with some examples to know how to use the TAN function in the Excel spreadsheet.

  • Initially, you have to open your Excel workbook on your PC and launch a worksheet that has data.
  • For example, we have given the degree values in Column B, and their corresponding radians in Column C.
  • Here, we will get the TAN value of the given radians in Column E using the TAN function.
Input ValuesPin
Input Values
  • Then, you have to enter the formula in the cell as shown below to get the result.
Enter the formulaPin
Enter the formula
  • After entering the formula, you need to click the Enter button to get the output, as shown below. You can drag down the cell to fill the remaining cells.

Input that Causes Error

  • If the argument is a non-numeric value (letters and special characters) and then it returns #VALUE! Error.
Value ErrorPin
Value Error


We hope that this short tutorial gives you guidelines to use Excel TAN Function. Please leave a comment in case of any queries, and don’t forget to mention your valuable suggestions as well. To learn more about Excel functions, then visit our webpage

Video Tutorial

The following video will show you how to use the Excel TAN function in the spreadsheet.

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