How to change decimal symbol and digit grouping symbol in Windows 10

Office 2016
When you work with numbers and amounts in Microsoft Word or Microsoft Excel, you can have some issues with decimal symbol or digit grouping symbol. Both symbols can be changed in the settings of the Windows system.

See Change the decimal point to a comma or vice versa for Excel.

A decimal symbol or decimal separator is a symbol used to separate the integer part from the fractional part of a number written in decimal form. This symbol can be a period or a comma.

For ease of reading, numbers with many digits may be divided into groups using a digit grouping symbol, such as comma, dot, space, etc.

To see or change pre-defined in Windows 10 decimal symbol and digit grouping symbol, do the following:

   1.   Open Control Panel.

See How to open Control Panel in Windows 10.

   2.   In the Control Panel dialog box, choose Change date, time, or number formats:

Control Panel Windows 10

   3.   In the Region dialog box, choose Additional settings...:

Additional settings Windows 10

   4.   In the Customize Format dialog box, choose appropriate value from the list Decimal symbol and/or Digit grouping symbol, or enter the new one:

Customize Format Windows 10

   5.   After clicking the Apply button, you can see how Windows will show amounts in the Example group in the bottom of the dialog box:

Example of the Customize Format Windows 10

See also this tip in French: Comment changer le symbole décimal et le symbole de groupement de chiffres dans Windows 10.

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