Concrete Volume
Cubic yards for slab, footing, column, footing-with-stem.
Example
You enter
- Shape slab
- Length (ft) 10
- Width (ft) 10
- Thickness (in) 4
- Waste factor (0-1) 0.1
You get
- Cubic feet 33.333
- Cubic yards 1.235
- Cubic yards with waste 1.358
Checked against published worked examples from: Naval Education and Training Professional Development and Technology Center.
Details, formula, and sources
Formula or tableVolume = L × W × T converted to cubic yards (1 yd³ = 27 ft³); waste factor 5–10% added per ACI 301 / engineering practice.
Source and editionACI 301 by name. IBC 2021 (International Building Code). §1905 references ACI 318 / 301.
Free accessACI standards licensed; principles free in published engineering texts.
What governsEstimate. AHJ and licensed structural engineer govern.
API field namesshape, length_ft, width_ft, thickness_in, waste_factor, cubic_feet, cubic_yards, cubic_yards_with_waste
- Default waste factor 10% unless user suppliesACI 301 / engineering practice