Abstract: A method for calibrating a rear view camera system provides a driver with an accurate and effective aid for backing a vehicle. The rear view camera system includes a closed circuit video camera connected to a video monitor mounted in the driver's area. A marker is placed a known distance from the rear of the vehicle. The system is calibrated by adjusting a horizontal rear scale line up and down on the monitor so that it coincides with the edge of the marker. Once the system is calibrated, as the vehicle is backed and the rear scale line contacts an object on the monitor, the driver knows that the vehicle is the known distance from the rear bumper of the vehicle.