Blend, chop, crush or puree quickly and easily with the 18″ blending arm and powerful variable speed 1 HP motor. Motor horsepower for our immersion blender motors was measured using a dynamometer, a machine laboratories routinely use to measure the mechanical power of motors. Our 1.0-horsepower (HP) motor reference reflects thehorsepower rating of the motor itself and not the immersion blender’s horsepower output to the blending vessel. The output horsepower to the blending vessel will be slightly less than 1.0HP.