Excel number format to only show decimals when necessary

Question

How can I, without using formulas, show integers as integers, but decimals limited to a specific number of decimal places?

E.g. show:
1 as 1
12 as 12
but 1.23456789 as 1.23

The number format 0.## is close but it shows 1 as 1. etc.

Answer 1

If acceptable, you may use the formula not in the sheet but as a condition for Conditional Formatting.

When your data is at A1:A4 as the sample on screenshot, we should create 2 Formatting Rules:

1. Formula is: =MOD($A1,1) = 0 Applies to: =$A$1:$A$4 Format the number as no decimals from the format of this rule.
2. Formula is: =MOD($A1,1) <> 0 Applies to =$A$1:$A$4 & Format the number to show 2 decimals.

Actually the 2nd condition is optional. You may format the whole column with 2 decimals and conditional format with the first rule so only the integers will have no decimals.

Please see my sample screenshot:

Answer 2

=IF(MOD(A1,1)=0,TEXT(A1,"0"),TEXT(A1,"0.00"))

Answer 3

A bit late to the Thread but I have a report which was calculating percentages to 7 decimal places, but the column also contains integers.

My conclusion was to use conditional formatting so if the Cell Contains a period/decimal point "." then to change the formatting to Number with 2 decimal places. This way if there isn't a period/decimal point then the values remain unedited.

Answer 4

If you would like to use the value as text you can use this (using A1 as the number):

=TEXT(A1,IF(MOD(A1,1)=0,"#","#.##"))

Explanation:
IF(MOD(A1,1)=0: This part checks if the number is a whole number with the modulo function.

"#","#.##": Use "#" if the condition is true and "#.##" if the condition is false. These are appropriate format options for integer and decimal numbers accordingly.

The number of hashes after the decimal in "#.##" define the maximum precision, but it will only display as many as required e.g. 2.1 would not be "2.10", but "2.1" instead.

Alternatively: "#.00" can be used to always pad with 0's, which would make "1.3" become "1.30".