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

Default IPD (mm)

Required number in mm. Headset's default lens spacing.

User IPD (mm)

Required number in mm. User's measured interpupillary distance.

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

Compute the lens separation offset between a user's interpupillary distance and the headset default. Inputs are interpreted exactly in the displayed units and the calculation returns the following fields without presentation rounding.

Adjustment (mm)

Returned number in mm. Offset to apply; positive moves lenses outward.

• 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.
• Default IPD must be at least 0.
• User IPD 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.

• Distortion Correction Factor Calculator

  Compute the per-pixel radial correction factor 1 + k1·r² + k2·r⁴ used to undistort headset lens output.

• IPD From Pupils Calculator

  Derive interpupillary distance from the measured left and right pupil center positions.

• Chromatic Aberration Correction Calculator

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