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

Radius fraction

Required number. Normalized radius fraction between zero and one.

K1 coefficient

Required number. First radial distortion coefficient.

K2 coefficient

Required number. Second radial distortion coefficient.

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

Compute the per-pixel radial correction factor 1 + k1·r² + k2·r⁴ used to undistort headset lens output. Inputs are interpreted exactly in the displayed units and the calculation returns the following fields without presentation rounding.

Correction factor

Returned number. Multiplier applied to the undistorted radius.

• 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.
• Radius fraction must be at least 0.
• Radius fraction must be no greater than 1.
• 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.

• Display Pixels Per Degree

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

• Chromatic Aberration Correction Calculator

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

• IPD Adjustment Calculator

  Compute the lens separation offset between a user's interpupillary distance and the headset default.