You can use the formula:

Code:
    volts = 50000 / 255 * A/D Value
    if volts DIG 1 => 5 then
        volts = volts + 100
    endif
    volts = volts / 100
    debug cmd,line3,dec1 volts/100,".",dec2 volts//100
At say 2.5V the display will read 2.49 and the variable "volts" will hold 249.