Gravel Calculator - Estimate Landscaping Material in Yards .
Answer (1 of 5): A cubic yard is a measure of volume, yet you are trying to convert it to a tonne, which is a measure of weight. Thus, it is impossible to answer the question entirely correctly; there will always be variables. The most important variable is the substance. In this case its crushed stone, which is usually an aggregate of otherwise unusable stone.Maximum Pea Gravel Cost: 55 per ton or 8 per bag; Pea Gravel Installation Cost: 220 to 365 for 200sf; As you can see, pea gravel prices are not expensive and luckily, you don't need much more than one ton for most gravel projects. However, it always pays to know other options. Crushed Granite: 0.50/sf; Crushed Stone.