Densities and kinematic viscosities have been measured for the system benzene + methyl formate at 20 degrees C and for the systems benzene + ethyl formate, benzene + propyl formate, and benzene + butyl formate from 20 degrees C to 50 degrees C. The results for the system benzene + methyl formate have been correlated using a Redlich-Kister type of expression with temperature-independent parameters and the data for the systems benzene + ethyl formate, benzene + propyl formate, and benzene + butyl formate with temperature-dependent parameters. The viscosities have furthermore been compared to values predicted by means of the GC-UNIMOD model.