Please Note: This article is written for users of the following Microsoft Excel versions: 2007, 2010, 2013, 2016, 2019, and Excel in Office 365. If you are using an earlier version (Excel 2003 or earlier), this tip may not work for you. For a version of this tip written specifically for earlier versions of Excel, click here: Determining if Calculation is Necessary.
by Allen Wyatt
(last updated December 22, 2018)
Excel allows you to control when it recalculates a worksheet. Normally, Excel recalculates anytime you change something in a cell. If you are working with very large worksheets that have lots of formulas in them, you may want to turn off the automatic recalculation feature. You can turn off automatic recalculation using the tools in the Calculation group on the Formulas tab of the ribbon.
Your macros can also force Excel to recalculate your worksheet. If you have automatic recalculation turned on, then any change your macro makes in a worksheet will force Excel to recalculate. If you have automatic recalculation turned off, then you can use the Calculate method to recalculate a worksheet:
Of course, if recalculation takes quite a while to perform, you might want to check to see if a recalculation is necessary before actually forcing one. It appears that there is no flag you can directly check to see if a recalculation is necessary. The closest thing is to check the Workbook object's Saved property. This property essentially acts as a "dirty flag" for the entire workbook. If there are unsaved changes in a workbook, then the Saved property is False; if everything is saved, then it is True.
How does this help you figure out if a recalculation is necessary? Remember that calculation is only necessary when there are changes in a worksheet. Changing anything in a worksheet will also set the workbook's Saved property to False. Thus, you could check the Saved property before doing the recalculation, as shown here:
If Not ActiveWorkbook.Saved Then ActiveSheet.Calculate End If
There is only one problem with this approach, of course—the Saved property is only set to True if the workbook is actually saved. This means that you could recalculate multiple times without really needing to do so, unless you tie saving and recalculation together, as shown here:
If Not ActiveWorkbook.Saved Then ActiveSheet.Calculate ActiveWorkbook.Save End If
The wisdom of approaching this problem in this manner depends on the nature of your particular situation. If it takes longer to save the workbook than it does to simply recalculate, then this approach won't work. If, however, recalculation takes longer (which is very possible with some types of operations), then this approach may work well.
ExcelTips is your source for cost-effective Microsoft Excel training. This tip (5685) applies to Microsoft Excel 2007, 2010, 2013, 2016, 2019, and Excel in Office 365. You can find a version of this tip for the older menu interface of Excel here: Determining if Calculation is Necessary.
Program Successfully in Excel! John Walkenbach's name is synonymous with excellence in deciphering complex technical topics. With this comprehensive guide, "Mr. Spreadsheet" shows how to maximize your Excel experience using professional spreadsheet application development tips from his own personal bookshelf. Check out Excel 2013 Power Programming with VBA today!
Does your macro need to get some input from a user? Here are the ways that Excel provides for that input to be solicited.Discover More
If you need to know whether a particular value is odd or even, you can use this simple formula. Designed to be used in a ...Discover More
Need to select a cell using a macro? Need that selection to be relative to the cell you currently have selected? Here are ...Discover More
FREE SERVICE: Get tips like this every week in ExcelTips, a free productivity newsletter. Enter your address and click "Subscribe."
Got a version of Excel that uses the ribbon interface (Excel 2007 or later)? This site is for you! If you use an earlier version of Excel, visit our ExcelTips site focusing on the menu interface.