An image forming apparatus configured to convey a recording material having an unfixed image on a surface includes a fixing device configured to fix the unfixed image on the recording material and a control device configured to perform image forming process control of the image forming apparatus, the fixing device including: a heating member heated by a heating device and a pressure member that binds the recording material on the surface of which the unfixed image is formed, and while letting the recording material pass between the pressure member oneself and the heating member, fixes the unfixed image onto the recording material, the control device calculating integrated energy consumption per unit time based on power consumption of the heating device and time needed for a print mode, and performing control of changing the image forming process.