The research aims to investigate the information capacity of phase-only computer-generated holograms (CGH) quantized to certain bit depth level. Therefore, research data has been generated from the quantized CGH process for 800 target images sourced from the DIV2K Dataset (https://data.vision.ee.ethz.ch/cvl/DIV2K/). The research data contains target images' entropy and delentropy, computer-generated holograms' bit depth and entropy, and the normalised mean squared error (NMSE) between the reconstruction and target image. There are two files in total, where one contains the results for target images set at far field (Fraunhofer region) and the other contains the results for target images set at near field (Fresnel region). Each row in the csv file is corresponded to the result of one instance of a CGH algorithm run.