To calculate excavation cost, work out the volume of soil to be excavated. Multiply the length, width, and depth in feet to get cubic feet. Divide by 27 to convert it to cubic yards. Multiply that by the price per cubic yard.
For example, if you’re excavating a pit that’s 26 feet long, 10 feet wide, and 4 feet deep, the price per cubic yard is $100. In this case, 26 x 10 x 4 equals 1,040 cubic feet. Divided by 27 is 38.52 cubic yards. Multiplying by $100 gives an excavation cost estimate of $3,852.