The calculator answers the question that decides a selling price: how long the machine will run, and what the part actually costs. It separates engraving time — swept area divided by line interval — from cutting time, which only depends on path length multiplied by the number of passes.
Material cost is prorated over the number of parts nested on a sheet: on a batch, nesting drives the margin far more than the price of the board. Then come your machine hourly cost (electricity, consumables, lens, extraction, depreciation) and the margin you want to apply.
The tool is free and needs no account. It gives an estimate, not a quote: acceleration, carriage returns and layer changes mean a machine never reaches its programmed speed over the whole travel, so an allowance is added automatically — count more on very detailed artwork.
A common use is comparing two scenarios before producing: the same plate engraved as a solid fill or as an outline only, or the same object in 3 mm rather than 6 mm. The machine-time gap, often a factor of three or four, shows immediately and lets you quote a price you can stand behind.