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

Refresh Hertz (Hz)

Required number in Hz.

Refreshes Per Rendered Frame

Required integer.

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

Rendered frames per second when each rendered frame is displayed for a fixed number of display refreshes. Inputs are interpreted exactly in the displayed units and the calculation returns the following fields without presentation rounding.

Rendered Frames Per Second (fps)

Returned number in fps.

• 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.
• Refresh Hertz must be at least 0.
• Refreshes Per Rendered Frame must be at least 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.

• Spacewarp Frame Interpolation

  Generated in-between display frames per second when render rate is below display refresh; assumes exact rate division.

• Frame Time Budget Ms

  Milliseconds available per display refresh from target refresh rate in hertz.

• Geometry Throughput Triangles Per Frame

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