The compressive strength of rock materials under static loading is usually independent of the loading rate and has a constant value. Unlike static loading, the dynamic behavior of materials depends on the applied strain rate. To determine the changes in dynamic compressive strength with respect to the applied strain rate, the scaling law is used. In some materials, a small change in the applied dynamic strain rate leads to a significant increase in dynamic compressive strength. Of course, each material has its own scaling law, and to determine the scaling law, the dynamic compressive strength of the material must be evaluated for different strain rates by performing experiments. Applied strain rates have different ranges, and special laboratory equipment is required to apply each of the strain rate ranges. Therefore, after determining the dynamic compressive strength of the material for different values ​​of strain rates, a general trend between the strain rate and dynamic compressive strength parameters can be determined using laboratory studies. In this study, the scaling law on samples of the Sungun Porphyry (SP) rock type was determined using the Hopkinson testing machine. The study results show that increasing the strain rate applied to the sample leads to an increase in the dynamic compressive strength of the rock samples under test. By increasing the applied strain rate from a certain point, a small increase in the strain rate leads to a significant increase in the dynamic compressive strength, considered the transfer strain rate. Using laboratory studies, the transfer strain rate for the SP rock type was determined to be 2.6. Also, the general scaling law for the SP rock type was determined by curve fitting, and using this law, the compressive strength of the SP rock type can be predicted for any desired strain rate.