ConcreteCalc
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Concrete Volume Calculator

Concrete volume depends on the geometric shape of your structural pour: Rectangular Prism: V = Length × Width × Depth. Cylinder (Pier/Column): V = π × Radius² × Height. Trapezoid (Curb/Swale): V = ((Top Width + Bottom Width) / 2) × Depth × Length. Always calculate both net geometric volume and gross volume (including 10% waste) before ordering materials.

Interactive Concrete Volume Calculator

ENGINEERING SCHEMATIC
3D Geometric Concrete Volume Prisms
Volume (V) = Area × Depth 1 Cubic Yard = 27 Cubic Feet
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Pro Contractor Recommendation: Multiply cross-sectional area by length or depth. Divide cubic feet by 27 to obtain commercial cubic yards.
Shape Selection
Rectangular Dimensions
Waste & Safety Margin
Calculated Concrete Volume
1.96 Cubic Yards (yd³)

Includes 10% waste (Net: 1.78 yd³)

Cubic Feet (ft³)
52.8 cu ft
Net: 48.0 cu ft
Cubic Meters (m³)
1.50 m³
Metric volume
Estimated Wet Weight
7,656 lbs
3.6 metric tonnes
80 lb Pre-Mix Bags
88 bags
Or 118 x 60lb bags

Geometric Concrete Volume Formulas

Construction pours frequently involve non-rectangular cross sections. Here are the core engineering volume formulas supported by this calculator:

1. Rectangular Prism (Slabs, Beams, Footings)

Volume = Length × Width × Depth

For imperial dimensions, convert all inputs to feet before multiplying, then divide by 27 for cubic yards.

2. Cylindrical Form (Sonotubes, Round Columns, Caissons)

Volume = π × (Diameter / 2)² × Height

Radius is half the diameter. In feet: π × r² × h / 27 gives cubic yards.

3. Trapezoidal Prism (Curbs, Retaining Footings, Barrier Walls)

Volume = ½ × (Width₁ + Width₂) × Depth × Length

Uses the average cross-sectional width multiplied by the uniform pour depth and total run length.

Concrete Density & Weight Factors

Standard unreinforced normal-weight concrete weighs between 145 and 150 pounds per cubic foot (approximately 3,900 to 4,050 lbs per cubic yard, or 2,350 to 2,400 kg per cubic meter). Knowing total wet weight is vital for formwork bracing design, shoring strength, and transport vehicle weight limits.