The 150 pounds per cubic foot rule
Standard stone-and-sand concrete weighs about <strong>150 lbs per cubic foot (4,050 lbs per cubic yard)</strong>. Lightweight concrete runs 90–120 lbs/ft³, heavy mixes with iron aggregates can exceed 200. Weight matters for deck footings on structures, second-floor pours, countertops on cabinets, and loading a trailer with bagged mix.
Trailer and floor loading math
One cubic yard of concrete weighs over two tons — never in a half-ton pickup. For second-floor projects, a 2-inch decorative overlay adds about 25 lbs per square foot, which most residential floors carry fine, but long spans between joists should be checked against the joist table before pouring.