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

Usable Watt Hours (Wh)

Required number in Wh.

Average Watts (W)

Required number in W.

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

Estimated controller operating hours from usable battery energy and average electrical draw. Inputs are interpreted exactly in the displayed units and the calculation returns the following fields without presentation rounding.

Hours (h)

Returned number in h.

• 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.
• Usable Watt Hours must be at least 0.
• Average Watts 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.

• Controller Latency

  Serial controller input latency from scan, transport, and processing stages.

• Display Pixels Per Degree

  Nominal horizontal panel pixels per optical degree for one eye; ignores lens distortion and usable-pixel losses.

• Geometry Throughput Triangles Per Frame

  Average triangles rendered per frame from triangles per second and rendered frames per second.