Estimates volume and store bags for 3-foot and 4-foot wide pedestrian walkways and paths.
Professional results require proper jobsite tooling. Keep these essential items ready before starting your project:
Standard pre-calculated dimensions with built-in 10% safety margin.
| Slab Dimensions | Area (Sq Ft) | 4" Slab (Yds³) | 80 lb Bags (4") | 60 lb Bags (4") | 6" Slab (Yds³) | 80 lb Bags (6") | 60 lb Bags (6") |
|---|---|---|---|---|---|---|---|
| 10 ft × 10 ft (Small Patio) | 100 sq ft | 1.36 yd³ | 62 bags | 82 bags | 2.04 yd³ | 92 bags | 123 bags |
| 12 ft × 12 ft (Medium Patio) | 144 sq ft | 1.96 yd³ | 88 bags | 118 bags | 2.93 yd³ | 132 bags | 176 bags |
| 16 ft × 16 ft (Large Patio / Shed) | 256 sq ft | 3.48 yd³ | 157 bags | 209 bags | 5.22 yd³ | 235 bags | 314 bags |
| 20 ft × 20 ft (2-Car Garage Slab) | 400 sq ft | 5.43 yd³ | 245 bags | 326 bags | 8.15 yd³ | 367 bags | Truck Delivery |
Step-by-step contractor formula breakdown based on dimensional geometry and ASTM material densities.
Volume (Cubic Feet) = Length (ft) × Width (ft) × [Thickness (inches) / 12]
Cubic Yards = Volume (cu ft) / 27
Cubic Meters = Cubic Yards × 0.764555
Total Required = Raw Volume × (1 + [Waste Factor % / 100])
Trade-verified guidance for Concrete Sidewalk & Walkway Calculator.
Material Supply & Tool Deals (336x280 / Fluid)
Zero CLS Pre-Reserved Container