The Density of 1B Pea Gravel. For a colored variation expect to add an extra 20 to 50 to those prices. How To Build A Stable Pea Gravel Path Pea Gravel Patio Gravel Landscaping Backyard Landscaping Multiply the area and depth of the excavation to obtain its volume in cubic yards. . Our gravel calculator will display this value for you. The general range for a cubic yard of plain pea gravel is about 30 to 35 and a ton will cost about 40 to 45. For example if the area is 9 feet square and the gravel is to be a foot deep multiply 9 by 9 by 1 to get 81. A single cubic yard of pea gravel weighs about 13 short tons How many tons of pea stone are in a cubic yard. Lets say its d 2 yd. I want coverage to a depth of 3 inches with normal pea gravel 96 lbft³ costing 45 per US short ton. Multiply the three and divide the result by 27 to get cubic yardage. Make the calculations and see the changes. For example you will ...