One cubic foot of cement weighs approximately how many pounds?

• A. 105 lbs
• B. 95 lbs
• C. 75 lbs
• D. 120 lbs

Answer: (B)

Unit weight is the key idea here—the weight per unit volume of a material. For Portland cement in its dry bulk form, the density is about 1,500 kg per cubic meter, which converts to roughly 93–95 pounds per cubic foot. So one cubic foot of cement weighs about 95 pounds. If you were thinking of concrete instead of cement, the unit weight would be higher (around 145–150 pounds per cubic foot) due to the added water and aggregates. Since the question specifies cement, the best estimate is about 95 pounds.