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

Horizontal Pixels (px)

Required integer in px.

Horizontal Fov Degrees (deg)

Required number in deg.

The cited overview of Distortion (optics) supplies background for the terminology and domain context used by this tool.^[1]

Nominal horizontal panel pixels per optical degree for one eye; ignores lens distortion and usable-pixel losses. Inputs are interpreted exactly in the displayed units and the calculation returns the following fields without presentation rounding.

Pixels Per Degree (px/deg)

Returned number in px/deg.

• 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.
• Horizontal Pixels must be at least 1.
• Horizontal Fov Degrees 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.

• Resolution From Ppd Fov

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

• Render Scale Percentage

  Per-axis render resolution as a percentage of native panel resolution for one eye.

• Reprojection Error Pixels

  Approximate horizontal reprojection error in pixels from signed angular error and nominal pixels per degree.