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Concrete is made of cement, sand, gravel, and water. Calculating the volume before ordering or mixing prevents expensive over-ordering or frustrating shortages. Volume is always measured in cubic feet or cubic yards.
Trin-for-trin guide
- 1Measure length, width, and depth of the pour in feet
- 2Volume (cubic feet) = length × width × depth
- 3Cubic yards = cubic feet ÷ 27
- 4Add 5–10% waste factor for form overruns and spillage
Løste eksempler
Input
20×15 ft slab, 4 in (0.33 ft) deep
Resultat
3.33 yd³ + 10% = 3.67 yd³
20×15×0.33=99 ft³÷27=3.67
Input
Footing: 40×1×2 ft
Resultat
2.96 yd³
80 ft³÷27