Convert from Cubic Yards to Tons The Salt Institute says rock salt weighs 80 lbs. per cubic foot, or 2,160 lbs. per cubic yard. The formula is 80 times 27, divided by 2,000, which equals 1.08 tons. The institute uses the weight of 80 lbs. because the density can range from 72 ...
" meaning 1/2 cubic foot, or loose rock by the 1/2 yard, meaning one-half of a cubic yard. Some stone suppliers and landscape suppliers will deliver the rock. If you order it by the truckload, check how much lava rock you'll be getting in each load. For a large project...