Area, Volume, Asphalt Tonnage and Trenching Calculators for the Heavy Highway and Underground Utility Construction Industry featuring easy to use Calculators for Area Calculations that give Simultaneous results in Square Feet, Square Yards and Acres. Volume Calculations that give Simultaneous results in Cubic Feet, Cubic Yards and Tons. Trenching Calculators for Excavation Quantity. Trenching Backfill Calculators with Pipe Volume removed from Calculations. There is no more need to remember which formula to use simply provide the basic information needed using the provided drawings in calculator and click the calculate button and the calculator does the rest. (US Version)