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

Target Pixel Count (pixels)

Required number in pixels.

Base Pixel Count (pixels)

Required number in pixels.

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

Uniform linear render-scale factor needed for a target pixel budget relative to base resolution. Inputs are interpreted exactly in the displayed units and the calculation returns the following fields without presentation rounding.

Linear Scale Factor

Returned number.

• 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.
• Target Pixel Count must be at least 0.
• Base Pixel Count 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.

• Render Scale Percentage

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

• Resolution From Ppd Fov

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

• Foveated Rendering Gain

  Ideal pixel-work reduction factor from full-resolution pixel workload divided by foveated workload; not measured FPS gain.