Pressure/Temperature conversion formula's for refrigerants

Here is one:  http://www.advantageengineering.com/fyi/289/advantageFYI289.php

This gives the pressure required to keep the refrigerant liquid as a function of temperature.  That is some of the data you need to design a refrigerator.

But there is no absolute conversion between pressure and temperature.  At any particular pressure, a refrigerant can take on a wide range of temperatures.  What exactly are you trying to do?

Thanks for the fast response.

I'm creating an Inspection sheet tool for our technicians in excel.

When our technicians perform an inspection or maintenance, they have to input all there measurements in the excel file and a report in pfd will be printed.

To reduce the inputs (to gain time), I want all the required values that can be calculated, to be calculated and automatically filled in.

So they will have to fill in the low (suction) and high (Discharge) pressure measured, and based on the filled in pressures and type of refrigerant, i want the evaporating and condensation temperature automatically be calculated and filled in.