2.5 tons of gravel is about the size of a pickup truck bed, heaped. When poured into a loose pile, it is 7.72 ft wide and 3.02 ft tall.

Volume
1.74 cubic yards
1.74 yd³ (1.33 m³)
about the size of a pickup truck bed, heaped
Gravel typically ranges 1.6–1.9 g/mL depending on how it's packed. A firmly packed scoop weighs more.