The Excel ROMAN Function

Basic Description

The Excel ROMAN function converts an arabic number to Roman. I.e. for a supplied number, the function returns a text string depicting the roman numeral form of the number.

The format of the function is:

ROMAN( number, [form] )

Where the arguments are as follows:

number-The number that is to be converted to a Roman numeral (must be an integer between 0 and 1999).

An optional argument that specifies the form of the Roman numeral returned.

This can take any of the following values:

0-Classic form
1-More Concise
2-More Concise
3-More Concise
4-Simplified form
TRUE-Classic form
FALSE-Simplified form
If the [form] argument is omitted, it takes on the default value of 0 (denoting the classic form is used).

Note that if any of the arguments are input as decimal values, they are truncated to integers.

Roman Function Examples

The spreadsheets below show examples of the Excel Roman function used to convert the number 1999 to different forms of Roman numerals.

1=ROMAN( 1999, 0 )
2=ROMAN( 1999, 1 )
3=ROMAN( 1999, 2 )
4=ROMAN( 1999, 3 )
5=ROMAN( 1999, 4 )

Further examples of the Excel Roman function are provided on the Microsoft Office website.

Roman Function Error

If you get an error from the Excel Roman function this is likely to be the #VALUE! function:

Common Error

Occurs if either:

  • The supplied number is < 0 or > 3999, or is non-numeric;
  • The supplied [form] argument is supplied but is invalid (i.e. is not one of the values 0, 1, 2, 3 4, TRUE or FALSE).