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: Rounding in Results.

Rounding in Results

by Allen Wyatt
(last updated December 1, 2018)

2

Melissa was having a hard time understanding why Excel displays certain numbers in certain ways. She provided, as an example, the following steps:

  1. Start with a new, blank worksheet.
  2. In cell B2, enter 33.33333333.
  3. In cell B3, enter 33.333333333 (one more digit than in step 2).
  4. In cell C2, enter =B2*3.
  5. In cell C3, enter =B3*3.

When Melissa would do this, cell C2 would display the result as 99.99999999, and cell C3 would display the result as 100. (You may have to widen column C to see these results.)

To see why Excel does this, there are a few things you have to understand. First of all, when you create a new worksheet, all the cells are formatted using the General format. Using this format, information is displayed in a general manner (thus the format name). In this format, numbers are displayed using up to ten digits. It doesn't matter whether the digits are to the left or right of the decimal place; only a maximum of ten are displayed.

What happens if the number that you are entering has more than ten digits, or if the result of a formula has more than ten digits? Then Excel rounds the number so that no more than ten digits are displayed. Thus, 99.99999999 is displayed, but if you add one more digit, the rounded result is 100. Rest assured, however, that Excel continues to maintain the cell contents with fifteen digits of accuracy, even though fewer digits are displayed.

If the number you are entering contains nothing to the right of the decimal point, but there are more than ten digits in the number, then the General format results in the number being displayed using scientific notation.

There is one caveat to the above: if the General-formatted cell into which the value is placed is narrower than what is required to display the full number, then the value is rounded so that it can be displayed within the available column width. If you later adjust the column width so it is wider, then the number is reformatted so it is displayed with up to ten digits.

If you want to use more than ten digits to display your number, you need to explicitly format the cell. Either click on the Increase Decimal tool (Number group, Home tab of the ribbon) or display Format Cells dialog box and use the controls on the Number tab to control how the displayed number should be formatted.

ExcelTips is your source for cost-effective Microsoft Excel training. This tip (8032) 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: Rounding in Results.

Author Bio

Allen Wyatt

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. ...

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Comments

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What is eight more than 6?

2018-12-04 09:25:13

Liz

Sometimes I get a .01 cent difference in addition when the same numbers are added in two differing ways. The .01 is often an error - there is no one cent in my numbers or percentages of same. However, I cannot make it disappear. Example: Adding a long column, suddenly the total (as displayed on scroll bar) changes to show a .01. This happens even with different sets of numbers (if there are 50 numbers, and I select 1 through 30, or 31 through 50) so I cannot pinpoint the .01 to a specific cell. The total on the bottom line shows the .01 - and since this is for billing, the bureaucrats always make an issue of the 1 cent!
How do I solve this problem without manually changing the totals, which defeats the purpose of SUM? Thank you


2018-12-01 11:59:11

Erik

If the numbers are very small or very large, it can also help to use scientific notation. For example, if you display the curve fit equation in an X-Y graph.


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