There are many ways to name specific heat ratio, like specific heat capacity, the ratio of specific heats, Specific Heat Coefficient, gamma, etc…

The general equation for the specific heat ratio is the Coefficient of Pressure divided by the Coefficient of Volume

gamma=(Coefficient of Pressure)/(Coefficient of Volume)

More information on the specific heat ratio for air can be found here:

https://www.ohio.edu/mechanical/thermo/property_tables/air/air_Cp_Cv.html