This article presents my first version of my free Excel Add-In (Version 0.75 Build 151110) for calculating large numbers in Excel. The Add-In (you can download the file at the end of this article) currently implements functions for the addition, subtraction, multiplication and exponentiation of large numbers. The code in the Add-In is password protected; however you can unprotect the VBA project by using the password “excel-ticker” (without the quotes). Please also read the copyright notice and license terms in the last section of this article.

~~The Add-In is also digitally signed with a certificate which was issued to me by the company “TC TrustCenter GmbH, Germany”. So, only files including this digital signature have been created and published by me.~~

#### Naming conventions of the functions in the Add-In

The Add-In includes the functions described below, which can be accessed, for example, through the category “User defined” of the select function box in Excel. Each function of the Add-In is available in English, German and French.