Technologies are described herein for determining calibration settings for displaying content on a monitor. A user may use a mobile computing device to determine calibration settings for a monitor. A calibration tool on the mobile computing device causes one or more calibration images to be displayed on the monitor. The calibration images are used to determine settings related to gamma, brightness, contrast, color settings, and the like that are associated with the monitor. After a calibration image is displayed, the calibration tool utilizes a camera on the mobile computing device to capture an image of the calibration image. The calibration tool analyzes the captured image data to determine calibration settings for the monitor. The calibration tool may apply the calibration settings directly to the monitor or might adjust image data before the image data is displayed.