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콘크리트용 평방피트 계산기

콘크리트용 평방피트 계산기: Calculate surface area for concrete slabs, driveways, patios, and foundations. Cubic yards need a separate

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재료 낭비 요인선택 과목

재료비 추정선택 과목

Calculation Results
1 ft (12 in) 1 ft 1 ft² = 144 in²

Concrete Surface Area Calculator

Calculate the surface area of a slab, driveway, patio, or foundation. Concrete volume requires a separate depth calculation.

작동 방식

1

모양 선택

Choose the shape that matches your space.

2

치수 입력

모든 단위로 측정값을 입력합니다. 수량, 낭비 요소 및 재료 가격을 추가합니다.

3

결과 얻기

면적을 ft², in², yd², m², 에이커 및 예상 비용 단위로 한 번에 확인하세요.

자주 묻는 질문

Measure length and width of the pour area and multiply for surface area in square feet. For how much concrete to order, you also need slab thickness (depth).
Multiply area (sq ft) by thickness in feet, then divide by 27 for cubic yards. Example: 200 sq ft × 0.33 ft (4 inches) = 66 cu ft ÷ 27 = 2.44 cubic yards.
For 4-inch thickness, multiply sq ft by 0.0123 to get cubic yards. Example: 500 sq ft × 0.0123 = 6.15 cubic yards. Order 5 to 10% extra for waste, spillage, and uneven subgrade.
Add 5 to 10%. Use 5% on flat, well-prepared ground. Use 10% or more on uneven terrain, complex forms, or lots of edges. Running short mid-pour is worse than a little extra.
Calculate area, add waste, then enter price per square foot in Estimate Material Cost. Ready-mix concrete often runs $100 to $150 per cubic yard delivered. For cost per sq ft, divide total cost by area.
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