Concrete Weight Calculator
Quickly determine how much your concrete structure weighs. Enter slab dimensions or the total volume to get weight in pounds, US tons, kilograms, and metric tons. Supports standard, lightweight, and high-density concrete mixes.
Enter the concrete volume directly in cubic feet
If dimensions: L (ft) × W (ft) × T (ft)
Weight:
Weight (lbs) = Volume (cu ft) × Density (lb/cu ft)
Densities:
Standard: 150 lb/ft³
Lightweight: 110 lb/ft³
High Density: 200 lb/ft³
Reinforced: Add 5 lb/ft³
Conversions:
1 US Ton = 2,000 lbs
1 lb = 0.453592 kg
Volume = 10 × 10 × 0.333 = 33.33 cu ft
Weight = 33.33 × 150 = 5,000 lbs
In tons: 5,000 ÷ 2,000 = 2.50 US tons
In kg = 5,000 × 0.4536 = 2,268 kg
How much does a cubic foot of concrete weigh?
Standard concrete weighs approximately 150 pounds per cubic foot. Lightweight concrete with lightweight aggregates weighs 90-115 pounds per cubic foot. High-density concrete (used for radiation shielding) can weigh up to 200-300 pounds per cubic foot depending on the aggregate used.
How much does a typical concrete slab weigh?
A 10x10 slab at 4 inches thick contains 33.3 cubic feet of concrete and weighs approximately 5,000 pounds (2.5 tons). A 20x20 driveway at 4 inches contains 133.3 cubic feet and weighs about 20,000 pounds (10 tons).
Does reinforced concrete weigh more than plain concrete?
Yes, but the difference is minimal. Standard steel reinforcement adds approximately 1-2% to the total weight. For estimation purposes, the weight of rebar can be ignored for most projects. For highly reinforced structures, add approximately 5-10 pounds per cubic foot for the steel.
Why does concrete weight matter for construction planning?
Concrete weight is critical for: 1) Structural load calculations — ensuring floors and foundations can support the weight. 2) Crane and lifting equipment capacity. 3) Transport weight limits for ready-mix trucks. 4) Formwork and shoring design to support wet concrete pressure. 5) Shipping and freight cost calculations for precast elements.
🔗 Related Calculators
📐 Formula
If dimensions: L (ft) × W (ft) × T (ft)
Weight:
Weight (lbs) = Volume (cu ft) × Density (lb/cu ft)
Densities:
Standard: 150 lb/ft³
Lightweight: 110 lb/ft³
High Density: 200 lb/ft³
Reinforced: Add 5 lb/ft³
Conversions:
1 US Ton = 2,000 lbs
1 lb = 0.453592 kg
📝 Example Calculation
Volume = 10 × 10 × 0.333 = 33.33 cu ft
Weight = 33.33 × 150 = 5,000 lbs
In tons: 5,000 ÷ 2,000 = 2.50 US tons
In kg = 5,000 × 0.4536 = 2,268 kg