6 Inch Concrete Slab Calculator
This 6 inch concrete slab calculator instantly converts your slab's length and width into cubic yards, cubic meters, bags and estimated cost at a fixed 6-inch thickness — the depth typically used for driveways, garage floors and slabs carrying trucks.
Como usar esta calculadora
- Insira suas dimensões — pés para comprimentos, polegadas para a espessura.
- Ajuste as opções — porcentagem de desperdício, tamanho do saco e o preço local do concreto.
- Leia seus resultados — volume, sacos, peso e custo são atualizados ao vivo enquanto você digita.
A fórmula
Volume = Length × Width × 6/12 ft, then ÷ 27 for cubic yards Exemplo resolvido: A 10 ft × 10 ft slab at 6 inches: 10 × 10 × 0.500 = 50.0 ft³ ÷ 27 ≈ 1.85 yd³ before waste.
A slab poured 6 inches thick is the standard choice for driveways, garage floors and slabs carrying trucks. At this thickness, one cubic yard of concrete covers about 54 square feet, which makes ordering straightforward once you know your slab area.
Wondering how to calculate 6 inch concrete or how to figure 6 inch concrete by hand? Multiply area (ft²) by 0.5 (6 inches = half a foot) for cubic feet, then divide by 27. A slab 6 inches thick uses exactly 50% more concrete than the same slab at 4 inches — budget accordingly, and add rebar on a 12–18 inch grid for vehicle loads.
Enter your dimensions above and the calculator handles every conversion — cubic feet, cubic yards, cubic meters and litres — plus the number of bags by size and a 5–10% waste allowance so you don't run short mid-pour.
Perguntas frequentes
Perguntas comuns sobre a 6 inch concrete slab calculator.
How much concrete do I need for a 6 inch slab?
Multiply length × width in feet, then multiply by 0.500 (6 inches in feet) to get cubic feet, and divide by 27 for cubic yards. A 12 × 12 ft slab needs about 2.67 yd³.
How much area does one yard cover at 6 inches thick?
About 54 square feet. The rule of thumb is coverage (ft²) = 324 ÷ thickness in inches.
How many 80 lb bags for a 6 inch slab?
Each 80 lb bag yields ≈ 0.60 ft³. For a 10 × 10 ft slab at 6 inches (50.0 ft³) you'd need about 84 bags before waste.
Is 6 inches thick enough for my project?
6 inches suits driveways, garage floors and slabs carrying trucks. Thinner slabs are limited to toppings and paths; driveways need 5–6 inches and heavy-equipment pads 8 inches with rebar.
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