To turn off Excel's automatic calculation function, turn on Excel, click "Formula" in the top menu bar, and select "Manual" in "Calculation Options". Operations of different versions vary slightly: Excel 2016 and later Windows versions can be found directly under the "Formula" tab; the path for Mac version is similar; Excel Online or older versions may not support full functionality. Note after closing: Press F9 to update the data before saving, remind others that when sharing the file, it is currently in manual mode to avoid data or chart errors caused by unrefreshing.

If you find that Excel's automatic calculation function affects work efficiency, such as the file is too large, causing every change to be stuttered, or you just want to update the results at a specific time, you can turn off the automatic calculation. The operation is very simple, but many people are actually not sure how to set it up, especially the differences between different versions.

Below I will explain in a few parts how to disable Excel's automatic calculation and some usage suggestions.

How to turn off Excel's automatic calculation function

Turning off automatic calculations is actually very direct. Whether you use Excel or Mac version on Windows, the basic path is the same:

• Open Excel
• Click "Formulas" in the top menu bar
• Select Manual in Calculation Options

After this, Excel will not automatically recalculate the entire workbook when you modify the content of the cell. It will update the data only if you press F9 or click the “Recalculate” button.

This feature is especially useful when dealing with large tables and can significantly improve response speed.

Different operation details in different versions

Although the overall process is consistent, different versions of Excel have slightly different interface layouts, which is easy to confuse:

• Excel 2016 and later Windows versions : By default, there is a drop-down menu for "Calculation Options" under the "Formula" tab.
• Excel for Mac : The path is similar. Find "Calculation Options" in "Formula" and select "Manual".
• Excel Online or legacy Excel : There may be no complete manual calculation options, consider simplifying formulas or splitting files.

Sometimes the menu is collapsed, remember to click the "Formula" column to see if there is an expand button. If you cannot find it, you can try to quickly open the calculation options with the shortcut keys Alt M, C

Turn off the automatic calculations to pay attention to

Once changed to manual calculation, there are several small details that are easily overlooked:

• It is best to press F9 once before saving the file to ensure that the data is up to date.
• If someone opens your file, their Excel settings may still be calculated automatically, and data inconsistencies may occur
• If the data dependent on complex formulas is not refreshed in time, it may cause the graph to display errors.

So if you share it with others, it is best to give an explanation at the beginning of the document to remind them that it is currently in manual calculation mode.

In addition, if you just want to temporarily pause the calculation, you can press F9 to refresh it at once after modifying a batch of data, which is more efficient.

Basically all is it. The operation is not complicated but it can indeed save you a lot of waiting time, especially when processing large files.

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