Volume Estimator
Slab — L × W × thickness
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Cubic Yards—
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Volume & Quantity Estimator
Concrete Volume Calculator
Calculate concrete volume, cubic yards, cubic feet, and concrete quantity using accurate contractor-grade volume estimation formulas for slabs, footings, walls, and columns.
- Concrete Volume Estimation
- Contractor Friendly
- Instant Results
- Mobile Optimized
Concrete Coverage Guide
How far one cubic yard stretches at common thicknesses.
1 yd³ at 4 in
~81 sq ft
Patio slabs, sidewalks, light flatwork.
1 yd³ at 6 in
~54 sq ft
Garage floors, driveways, heavier slabs.
Footing strip
L × W × D
16 in × 8 in × 40 ft run ≈ 1.6 yd³ net.
Round column
πr²h
16 in Ø × 10 ft tall ≈ 1.16 yd³ net.
Practical Examples
Garage Slab
24×24 ft, 6 in thick.
Patio Slab
10×10 ft, 4 in thick.
Foundation Footing
40 ft run, 2 ft wide, 12 in deep.
Concrete Column
16 in diameter, 10 ft tall.
Volume Formulas
V = L × W × T (ft)÷ 27 for cubic yards · × (1 + waste%) for ordering quantity
Use this concrete cubic volume calculator to calculate concrete volume before calling the plant. For yard-first dispatch math, see the concrete yard calculator. For flatwork presets with cost, try the concrete slab calculator.
Contractor Volume Tips
- Break complex pours into prisms. Steps, thickened edges, and grade beams are easier as separate rectangles you add together.
- Measure inside forms. Volume follows formed dimensions, not property lines.
- Add waste on the order quantity. 5–10% is normal; this tool applies your waste to CF, CY, and m³ outputs.
- Round truck loads up. A 10.2-yard pour on a 10-yard truck still schedules as two loads at many plants.
- Cross-check steel. After volume is set, run concrete and rebar calculator or rebar calculator on the same footprint.
Concrete Volume FAQ
What is the difference between net and quantity cubic yards?
Net yards are pure geometry. Quantity includes your waste percentage—the number closer to what you tell dispatch.
How do I calculate a wall pour?
Length × height × thickness in feet gives cubic feet. A 30 ft wall, 8 ft tall, 8 in thick is about 5.9 yd³ before waste.
Does the stair mode include landings?
Stair volume uses a wedge estimate under the flight. Add landing slabs separately as a rectangular slab.
How accurate is the column calculator?
It uses a true cylinder formula. Bell footings and capitals need extra segments added manually.