Free construction material calculators for concrete, asphalt, gravel, concrete blocks and cubic yards. Estimate volume, tons, bags, blocks, cost and waste.Construction Calculators is a free collection of construction material calculators for planning DIY, landscaping, driveway, and jobsite projects. Estimate concrete yards and bags, asphalt tons and driveway cost, gravel and pea gravel quantities, concrete block counts, and cubic yards.