Rectangle Concrete Calculator
The rectangle is the workhorse of concrete work — slabs, pads, walks and floors. This rectangle concrete calculator multiplies length × width × thickness and converts to every ordering unit.
Come usare questa calcolatrice
- Inserisci le tue dimensioni — piedi per le lunghezze, pollici per lo spessore.
- Regola le opzioni — percentuale di sfrido, dimensione del sacco e il prezzo locale del calcestruzzo.
- Leggi i risultati — volume, sacchi, peso e costo si aggiornano in tempo reale mentre digiti.
La formula
Rectangle volume = Length × Width × Thickness Esempio svolto: A 12 × 10 ft pad at 4 in: 12 × 10 × 0.333 = 40 ft³ ÷ 27 ≈ 1.48 yd³ (≈ 1.13 m³).
Every concrete calculator rectangle computation reduces to three numbers, but unit slips cause most ordering errors — thickness measured in inches must become feet (divide by 12) before multiplying.
Rectangles also underpin composite estimates: L-shapes, U-shapes and stepped slabs are just rectangles added together. If your pour is several rectangles, run each here and sum, or use the irregular shape calculator.
Results include cubic feet, cubic yards, cubic meters and litres, plus bags by size, concrete weight and cost with your local price.
Domande frequenti
Domande comuni sulla rectangle concrete calculator.
How do I calculate concrete for a rectangle?
Length × width × thickness in one unit. In feet: a 20 × 10 ft slab at 4 in is 20 × 10 × 0.333 = 66.7 ft³ ≈ 2.47 yd³.
Does it work in metric?
Yes — switch to metric and enter meters and centimeters; results show cubic meters and litres alongside imperial units.
What about non-rectangular pours?
Use the dedicated circle, triangle, trapezoid, octagon or L-shape calculators, or split any odd footprint into rectangles with the irregular shape calculator.
How much waste should I add?
5% for clean formed rectangles, 10% for pours on rough or sloping subgrade.
Calcolatrici correlate
Altri strumenti della famiglia di calcolatrici per calcestruzzo.