How to Use This Calculator
- Enter the Lens Angle in degrees (typically provided by the display or projection lens manufacturer)
- Enter the Viewing Distance in meters (the distance from your eyes or projection surface to the display)
- Click the Calculate button to see the calculated horizontal and vertical field of view
- Use the Reset button to clear all inputs and start over
Understanding Field of View
The field of view (FOV) is the extent of the observable world that is seen at any given moment. In displays and projections, it refers to the angle within which the content is visible to the viewer.
Important Notes
- This calculator uses a simplified formula that assumes a typical 4:3 aspect ratio for content. The actual vertical FOV may vary depending on the display's native aspect ratio.
- The vertical FOV calculation uses an approximation of 70% of the horizontal FOV, which is a common industry standard but may not apply to all displays.
- For precise calculations, especially for specialized applications like virtual reality or medical imaging, consult the manufacturer's specifications.