Professor Excel
custom, number, format, excel

Custom Number Formats: Big Guide, Popular Codes and a Free Download

Excel provides many default number formats. But often, these formats are not enough. For example:

Example: The default and a modifyed number format.

  • You want to display number in thousands or millions?
  • Or have a thousands separator for percentage values?
  • Or show a plus sign for positive values?

In such case, you need to create a custom number format. In this article, you learn everything you need to know. For making it easier for you, please feel free to download the example Excel file or the handy custom format card for printing it out.


thousands, decimal, separator, change, excel, powerpoint, thinkcell

Change Thousands & Decimal Separators in Excel, PowerPoint and ThinkCell

Sometimes you don’t want the comma “,” as a thousands separator, but rather a full stop “.”. Or you don’t want the full stop as the decimal separator. Changing these two separators in Office is easy: You can either do it system-wide or override the system settings.


force, cell, format, formatting, text, number

Force Any Cell to Your Desired Format in Excel

You are changing the cell format, for example from “text” to “number” and nothing happens? Or the other way around, you want to enter a phone number but Excel automatically converts it to a number? Unfortunately, Excel is very unpredictable when it comes to text/number formatting. Here is what you should do in order to force Excel to accept your desired format.

random, number, excel, how-to

Random Values in Excel: Everything You Should Know (+XLSX-Download)

Sometimes, you want to create random values in Excel. There is a simple formula to generate random numbers: RAND. If you type =RAND() into a cell, you’ll get a number between 0 and 1. So what do you do, if you want to have random number between 20 and 50 for example?

hide, zeros, zeroes, excel

Hide Zero Values in Excel: 3 Simple Methods

There are many reasons why you might want to hide zero values in Excel. For example when working with cell links, Excel shows a 0 even if the source cell is blank. Or because it might look more professional. Whatever reason you have, there are different methods for hiding zero values. Depending on the scope (for example one worksheet or just selected cells), different methods are most suitable. In this article we explore 3 methods of hiding zero values in Excel and compare them.