It is possible to calculate projection distance and screen size by moving the on-screen projector, or entering numeric values.
The distance and screen calculator is availablehere.
Applicable models: SX6, SX50, SX60, X600, LV-5210, LV-5220, LV-7210, LV-7220, LV-7230, LV-7240, LV-7250, LV-7215, LV-7225, LV-7245, LV-7255, LV-7555/F Standard Lens, LV-7555/F Ultra Wide Angle Lens, LV-7555/F Wide Angle Zoom Lens, LV-7555/F Long Focus Zoom Lens, LV-7555/F Ultra Long Focus Zoom Lens, LV-7565/F Standard Lens, Ultra Wide Angle Lens LV-7565/F Wide Angle Zoom Lens LV-7565/F Long Focus Zoom Lens LV-7565/F Ultra Long Focus Zoom Lens, LV-S3, LV-S4, LV-X4, LV-X5, LV-X6