pressure

hi sir

i need one help

now iam doing project on 89c51 using C51 Evaluation Software

i converted 0-5 analog volatge to 0-5 digital voltage .

now i want convert digital data to pressure

my output should be like this

0v 1.1E-1 3v 4.1E-4
0.1 1.2E-1 4v 5.1E-5
1v 2.1E-2 5v 6.1E-6
2v 3.1E-3

i want 500 values in between 0 to 5 volts
how to calibrate the voltage interms of preesure
what logic i want use to convert Voltage to pressure
my C51 not taking floting oparations

please help

regards
chandra sri