Abstract: A method of manufacturing a custom foot orthotic for a patient is described. The method includes collecting dynamic pressure data of a plantar surface of the foot of the patient at multiple time frames during a gait cycle of the patient, determining the dimensions of the patient's foot from the dynamic pressure data, scaling a three dimensional model of a foot orthotic along the x and y axes to form a scaled three dimensional model which approximates the dimensions of the patient's foot and adjusting the height of the scaled model along the z-axis in one or more regions based on the dynamic pressure data to form a three-dimensional model of the custom foot orthotic. A method is also provided which includes creating a two-dimensional model of a custom foot orthotic from dynamic pressure data and extruding the two-dimensional model in one or more regions based on the dynamic pressure data to form a three-dimensional model of the custom foot orthotic. The orthotic can be manufactured using 3D printing.