Use this virtual-reality calculation for a first-order display, optics, tracking, rendering, or latency estimate when all stages and units are explicitly defined.

Focal length (mm)

Required number in mm. Effective focal length of the lens.

Sensor width (mm)

Required number in mm. Width of the sensor or display area covered.

The cited overview of Field of view supplies background for the terminology and domain context used by this tool.^[1]

Compute the field of view covered by a lens as 2·atan(sensor width / (2·focal length)). Inputs are interpreted exactly in the displayed units and the calculation returns the following fields without presentation rounding.

Field of view (°)

Returned number in °. Field of view across the sensor width.

• Lens calibration, per-eye geometry, display scanout, asynchronous pipelines, tracking filters, workload variation, user anatomy, and device firmware can make measured VR behavior differ from a serial model.
• Focal length must be at least 0.
• Sensor width must be at least 0.
• Use finite inputs in the displayed units, preserve source measurements and assumptions, and independently verify consequential decisions.

Validate the estimate on the target headset with calibrated motion, optical, frame-timing, and latency measurements under a representative workload.

• Focal Length From FOV VR Calculator

  Compute the lens focal length needed for a field of view as sensor width / (2·tan(FOV/2)).

• Resolution From Ppd Fov

  Minimum integer horizontal pixel count for a target nominal pixels-per-degree and horizontal field of view.

• Distortion Correction Factor Calculator

  Compute the per-pixel radial correction factor 1 + k1·r² + k2·r⁴ used to undistort headset lens output.