The basic automatic curtain pleater with auto pleat calculation. A simple and basic automatic sewing workstation that can pleat, sew and tack the curtain in one step of a pedal. Machine can do single, double and triple pleat by simply adding or removing pleating metals. The pleating will be done at the same time when the sewing and tacking, therefore increasing the production efficiency at its highest. Equipped with “Automatic Curtain Pleat Calculation Module” that allows operator to input the curtain panel’s original width, pleat’s numbers, preferred pleat distance and some other parameter, as well as the targeted finished width after pleating on the Touch Screen control panel. Then the computer module will automatically calculate the parameters based on the operator’s required measurement and then the pleating device will adjust automatically depending on the parameters from the curtain pleat calculated values.