Convert Between Diagonal, Horizontal, and Vertical Field of View
Camera manufacturers most commonly advertise a camera's diagonal field of view (FOV), and in some cases the horizontal field of view. While these specifications are useful for general comparisons, they are often insufficient for technical applications that require a precise understanding of how much of a scene is captured in both the horizontal and vertical directions.
Knowing both the horizontal FOV (HFOV) and vertical FOV (VFOV) is especially important in applications such as drone mapping, photogrammetry, 3D reconstruction, surveying, computer vision, and simulation. In these workflows, FOV directly affects ground coverage, image overlap, measurement accuracy, and geometric correctness.
In many situations, only one FOV value is available. For example, a camera specification may list the horizontal FOV when the vertical FOV is required to determine image height on the ground or forward overlap in a mapping mission. In other cases, software tools or simulation engines may require vertical FOV as input even though the camera is specified horizontally. To accurately convert between horizontal and vertical FOV, the camera's aspect ratio must be known, since the relationship between the two depends on the sensor or image dimensions.
This web application simplifies these calculations by allowing you to convert between diagonal, horizontal, and vertical field of view using the camera's aspect ratio. It provides a quick and reliable way to obtain the FOV values needed for mission planning, modeling, and analysis.