Dimension of an air distribution channel of a pneumatic cylinder is an important factor in a manufacturing process for developing a basic standard for industrial production. The main challenge is how to formulate a computation of the dimension in the form of a simple equation that can serve as a useful guide for local industries. The aim of this research is to determine the dimension of the air distribution channel of a pneumatic cylinder. Load cells and fitting dimension variant can be attached at the end of piston road and in inlet/outlet port of pneumatic cylinder. Furthermore moving time of piston road and loads derived from control valve and sensor operated. A number of factors related to various operating and loading conditions need to be considered to obtain optimum performance of the pneumatic cylinder. The results show that the working pressure and intake diameter are directly proportional to the cylinder performance. Increasing load of the cylinder causes a reduction in the pressure. For any changes in the dimension of the air distribution channel, the operation pressure and the external load influence the air flow speed entering the cylinder and at the same time also affect piston speed. Thus, an effective mathematical expression for computing the dimension of the channel in the pneumatic cylinder has been developed for that can be used in a manufacturing process, thereby yielding a useful product for both consumers and industries. Keywords: Dimension, Channel, Cylinder, standard, performance