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

X Rms Millimeters (mm)

Required number in mm.

Y Rms Millimeters (mm)

Required number in mm.

Z Rms Millimeters (mm)

Required number in mm.

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

Three-axis tracking jitter magnitude from per-axis RMS position errors in millimetres. Inputs are interpreted exactly in the displayed units and the calculation returns the following fields without presentation rounding.

Rms Magnitude Millimeters (mm)

Returned number in mm.

• 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.
• X Rms Millimeters must be at least 0.
• Y Rms Millimeters must be at least 0.
• Z Rms Millimeters 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.

• Tracking Drift Per Hour

  Linear extrapolation of measured position drift to millimetres per hour.

• Render Scale Percentage

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

• Display Pixels Per Degree

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