Junk removal pricing is usually driven by more than the pile alone. Volume matters, but so do labor, access, item type, and whether the crew is clearing a clean curbside load or working through the property to get everything out.
Volume is only part of the picture
A large, tidy curbside load can be simpler than a smaller load spread through a house, basement, garage, and backyard. That is why volume matters, but it is rarely the only factor.
Labor and access often move the price more than people expect
Upper floors, elevators, narrow hallways, stairs, gate codes, long carries, and parking restrictions can all make a job take longer even if the total load is moderate.
The cleanest way to get a realistic price
Photos, a clear description of the location, and a rough idea of the item types usually matter more than trying to guess a perfect volume yourself.