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

Lost Milliseconds (ms)

Required number in ms.

Session Milliseconds (ms)

Required number in ms.

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

Lost tracking time as a percentage of a measured session duration. Inputs are interpreted exactly in the displayed units and the calculation returns the following fields without presentation rounding.

Loss Percent (percent)

Returned number in percent.

• 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.
• Lost Milliseconds must be at least 0.
• Session Milliseconds 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.

• Latency Compensation Prediction Time

  Prediction horizon from measured motion-to-photon latency plus a user-supplied timing reserve.

• Tracking Drift Per Hour

  Linear extrapolation of measured position drift to millimetres per hour.

• Chromatic Aberration Correction Calculator

  Compute the radial scale correction that removes measured color channel separation at a reference radius.