ADC integer to volt conversion

Dear all,

I am using 14 bit ADC(AD62p49 with LVDS mode) to acquire data and the data is acquired correctly but I am capturing the
data through C++ code and hence capturing it in 16-bit short integer with left justified.

Now the problem is I have to convert it back to the volts and I think if I divide by 2^15 (MSB is sign bit).
but the value that I get is not correct.

Any experience for this conversion.

Bests,

Shan