What goes into the price
An installed artificial turf price is not just the turf. A professional job is roughly four parts: the turf material itself, the labor to install it, the base and infill and site prep underneath it, and overhead like edging and haul-away. On a typical lawn, labor and prep together are about half the total.
That is why a bottom-up "cost of the roll" number badly understates a real install — it leaves out the crew, the compacted base, the seaming, and the infill that make turf drain and stay put. The calculator uses published installed ranges that already include all of it, then shows the allocation so you can see where the money goes.