The weight of 1 cubic foot of rock depends on the type of rock, as different rocks have different densities. On average:
- Granite weighs about 165 pounds per cubic foot (lb/ft³).
- Limestone typically weighs around 160 lb/ft³.
- Sandstone can range from 130 to 150 lb/ft³.
For general purposes, the weight of rock is usually in the range of 130 to 170 pounds per cubic foot, depending on the material.