Concrete calculator for slab volume

Length

Unit Feet (ft) Inches (in) Meters (m) Centimeters (cm) Millimeters (mm)

Waste (%)

Width

Unit Feet (ft) Inches (in) Meters (m) Centimeters (cm) Millimeters (mm)

Thickness

Unit Inches (in) Feet (ft) Millimeters (mm) Centimeters (cm) Meters (m)

Calculate Copy result

— Enter dimensions and calculate.

• 10 ft × 12 ft × 4 in = 40 cu ft ≈ 1.481 cu yd ≈ 1.133 m³
• With 10% waste → order 44 cu ft (theoretical is not ceil-rounded)
• 1 cu yd = 27 cu ft; 1 cu ft = 0.028316846592 m³

For estimating and planning. Does not determine structural thickness, reinforcement, strength, or code compliance. Does not invent ready-mix minimums or bag yields.

Method: convert L/W/thickness to feet, volume = L×W×T. Show cuft, cuyd (÷27), and m³ (×0.028316846592). Order volume = theoretical × (1+waste%). Example: 10 ft × 12 ft × 4 in = 40 cuft ≈ 1.481 cuyd ≈ 1.133 m³; +10% waste → 44 cuft order. Not a structural design tool.