Probably:

4/3*(x + IIF(x%3=0,0, 3 - x%3))

>If a file on a remote server is x bytes and it is transferred to the client after being strconv(,13) then I want to know on the client side what the total bytes to be transfered will be before I begin the transfer :)
>
>
>>Why not just:
>>?LEN(STRCONV(yourstring,13))
>>
>>>Hi All.
>>>
>>>Is there a formula that can calculate the resultant size of a string after it has been base64 encoded? i.e. if I know a string is 100 chars long is there a way to know what the base 64 encoded string length will be?