A reconfigurable image scaling circuit includes a horizontal scalar, a bufferer, and a vertical scalar. The horizontal scalar is configured to generate a horizontally scaled image data by scaling an input image data horizontally. The bufferer includes a mapper and a plurality of buffers. The plurality of the buffers are configured to store the horizontally scaled image data. The vertical scalar is configured to generate an output image data by scaling the horizontally scaled image vertically using a vertical scaling method.