Of course, the performance gain will be different from one scenario to the other - we will offer some advise on which functions could prove faster than others. Some functions can do what another function can much faster. Not all formulas are created equal, and some of them simply run slower than the others. In this guide we're going to show you how to make Excel calculate faster. How formulas are used, and size of the workbook are typically the culprit if your workbook takes minutes to calculate. However, depending on your system, it can also get pretty slow when running complicated calculations. Excel is a fairly an efficient software given that it can perform complex calculations.