Estimate concrete volume and pre-mixed bag counts for slabs, columns, circular slabs, curb & gutter barriers, and stairs. Based on 133 lb/ft³ (2,130 kg/m³) density. All dimensions accept feet, inches, yards, meters, or centimeters.
Rectangular prism. Formula: V = Length × Width × Thickness × Quantity
Cylinder. Formula: V = π × (Diameter / 2)² × Depth × Quantity
Cylindrical ring. Formula: V = π × ((d1/2)² − (d2/2)²) × Height × Quantity. Inner diameter must be smaller than outer diameter.
L-shaped cross-section extruded along a length. Formula: V = (Curb Depth × Curb Height + Gutter Width × Flag Thickness) × Length × Qty
Stair wedge + platform. Formula: V = Width × Rise × Steps × (0.5 × Run × Steps + Platform Depth)