Got a version of Excel that uses the menu interface (Excel 97, Excel 2000, Excel 2002, or Excel 2003)? This site is for you! If you use a later version of Excel, visit our ExcelTips site focusing on the ribbon interface.
With more than 50 non-fiction books and numerous magazine articles to his credit, Allen Wyatt is an internationally recognized author. He is president of Sharon Parq Associates, a computer and publishing services company.
Learn more about Allen...
Please Note: This article is written for users of the following Microsoft Excel versions: 97, 2000, 2002, and 2003. If you are using a later version (Excel 2007 or later), this tip may not work for you. For a version of this tip written specifically for later versions of Excel, click here: Forcing Manual Calculation For a Workbook.
Excel workbooks can become quite complex. In fact, it is possible to create workbooks that can take hours to calculate. The only problem with this, of course, is that when you open a workbook, it automatically recalculates if you have Excel configured to do that. This means that just opening a workbook can, in some instances, take hours.
One solution, of course, is to turn off automatic recalculation before you open the workbook. If you are like me, this solution isn't that great because my memory isn't always that great.
A better solution is to turn off automatic recalculation for certain workbooks. Since Excel doesn't allow you to specify manual or automatic recalculation on a workbook-by-workbook basis, you will need to add this feature through the use of a macro that automatically runs when the workbook is opened. This macro can turn off automatic recalculation, as shown here:
Private Sub Workbook_Open() Application.Calculation = xlManual Application.CalculateBeforeSave = False End Sub
This macro must be placed in the ThisWorkbook project window. This means that you should open the workbook, press Alt+F11 to display the VBA Editor, and then double-click on the ThisWorkbook object in the Object Browser (upper-left corner of the VBA Editor window).
If you want, you can also place another macro right after the previous one. This macro is run automatically when the workbook is closed and, in this case, turns automatic recalculation back on:
Private Sub Workbook_BeforeClose(Cancel As Boolean) Application.Calculation = xlAutomatic Application.CalculateBeforeSave = True End Sub
There is an important caveat to remember in relation to using this macro. You can only set the calculation mode for the application as a whole. Thus, with automatic recalculation turned off, no other worksheets will be automatically recalculated, either.
ExcelTips is your source for cost-effective Microsoft Excel training. This tip (1988) applies to Microsoft Excel 97, 2000, 2002, and 2003. You can find a version of this tip for the ribbon interface of Excel (Excel 2007 and later) here: Forcing Manual Calculation For a Workbook.
Professional Development Guidance! Four world-class developers offer start-to-finish guidance for building powerful, robust, and secure applications with Excel. The authors show how to consistently make the right design decisions and make the most of Excel's powerful features. Check out Professional Excel Development today!