Working with Imperial Linear Distances

Peter asked if it was possible in Excel to create a custom number format that will deal with imperial linear distances, such as inches, feet, miles, etc. The short answer is that no, this is not possible. Excel works natively in the decimal system, and many imperial measuring systems are based on other numeric systems (feet on base 12, for instance). While custom formatting can change the way that numbers are displayed, it cannot perform the conversions necessary for imperial measurements.

Your best bet is to keep the different units of whatever imperial measurement you want in different cells. For instance, a distance of 3 miles, 428 feet, and 7 inches could be kept in three cells, one for miles, one for feet, and the other for inches. You could then write the formulas necessary to convert to whatever measurement system you desire. There are also Excel add-ins available around the Internet (a quick search will find them) that can allow you to use this technique to work with linear measurements.

Another approach is to develop a custom function or macro that would convert a value into a linear measurement and display it as text. You couldn't use the result in math functions, but it may give you want you want for your workbook. Consider, for example, the following simple macro:

Function N2MYFI(x) As String
    Dim x1 as Long
    Dim FinalAnswer As String

    x1 = x
    Distances = Array(63360, 36, 12, 1)
    
    FinalAnswer = ""
    For Each Item In Distances
        FinalAnswer = FinalAnswer & " " & Int(x1 / Item)
        x1 = x1 - Item * Int(x1 / Item)
    Next

    N2MYFI = Trim(FinalAnswer)
End Function

This function returns four numbers, in a string, that represent the number of miles, yards, feet, and inches (MYFI) in a raw value. It is assumed that the value fed to the function is in inches, such as the following:

=N2MYFI(100)

This returns the string "0 2 2 4", which means there are 2 yards, 2 feet, and 4 inches in 100 inches. The function could easily be changed to return the values in any format desired.