Formatting Issues

How to Use Decimal Points Instead of Commas in Excel and Word

Amos GikundaAmos Gikunda Oct 26, 2026 869 views

Question details

The user needs to change the default decimal separator from a comma to a decimal point (period) in Microsoft Excel and Word.

How to Use Decimal Points Instead of Commas in Excel and Word
Product
Excel and Word
Device & OS
not provided
Scenario
Formatting numbers and utilizing dotted tab stops in spreadsheets and text documents.
Observed behavior
Numbers and values are displaying with commas for decimal separators instead of periods due to the operating system's regional settings.
Before you start

Close all active instances of Excel and Word before modifying your system's language and region settings to ensure the new decimal formatting is applied correctly upon restarting the applications.

Solution 1Recommended

Change Decimal Separator in macOS Language & Region Settings

Adjust your Mac's global regional settings to force the operating system and all applications to use a period instead of a comma for decimal values.

Excel and Word inherit their default number formatting directly from your operating system. Modifying the macOS System Settings will immediately resolve the decimal separator issue across both applications.

1
Open System Settings

Click the Apple menu in the top-left corner of your screen and select 'System Settings' (or 'System Preferences' on older macOS versions).

2
Access Language & Region

Scroll down the left sidebar and click on 'General', then select 'Language & Region'. If you are on an older OS, simply click the 'Language & Region' icon in the main grid.

3
Modify Number Formatting

Click the 'Advanced' button or look for the 'Number Format' section. In the 'Number separators' area, click the dropdown next to 'Decimal' and change it from a comma (,) to a period (.).

4
Save and Restart

Save your changes, restart your computer to flush the system cache, and then open Excel and Word to verify that decimal points are now being used.

Change Decimal Separator in macOS Language & Region Settings
System-Wide Impact: Updating this setting affects how numbers, dates, and times are displayed globally across all software on your computer, not just Microsoft Office applications.

Easily Control Number Formatting with WPS Office

WPS Office provides highly flexible formatting controls, allowing you to seamlessly switch between commas and decimal points without altering your computer's complex system settings.

  1. 1. Open WPS Spreadsheet Options: Launch WPS Spreadsheet, click on the 'Menu' button in the top-left corner, and select 'Options' from the dropdown list.
  2. 2. Access the Edit Tab: In the Options dialog box, click on the 'Edit' tab located in the left navigation pane.
  3. 3. Disable System Default Separators: Scroll to find the 'Use system separators' checkbox and uncheck it to enable manual input.
  4. 4. Set the Decimal Point: Enter a period (.) in the 'Decimal separator' text box and click 'OK' to instantly apply the new formatting to your spreadsheets.
Fully compatible with Microsoft Excel (.xlsx) and Word (.docx) file formats.Built-in advanced settings to independently control decimal and thousand separators.Lightweight, fast-loading, and completely free for daily document and spreadsheet tasks.
microsoft office alternative - wps office

Frequently Asked Questions

Why did my decimal point suddenly change to a comma in Excel?

This usually occurs if your computer's region or language settings were updated, often automatically during a system update. Certain regions, especially in European countries, use commas as the default mathematical decimal separator.

Will changing the decimal separator affect my existing spreadsheets?

Yes, the visual display format of your existing numbers will automatically update to show periods instead of commas, but the actual underlying numerical data and formulas will remain completely unchanged.

Can I change the decimal separator for just one specific document?

No, changing the system regional settings or adjusting the global application options applies the new separator format to all documents and spreadsheets opened on that specific device.