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Construction

Calculatrice vérifiée avec une formule transparente

Construction

Concrete Yardage Calculator.

Estimates the volume of concrete needed for a slab in cubic yards based on length, width, and thickness.

Les résultats se mettent à jour en direct pendant que vous tapez.
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Vos entrées

Comment ça marche

  1. 1

    Convert thickness from inches to feet by dividing by 12.

  2. 2

    Multiply length, width, and thickness in feet to get cubic feet.

  3. 3

    Divide cubic feet by 27 to convert to cubic yards.

  4. 4

    Round the result to two decimal places.

round((length * width * (thickness / 12)) / 27 * 100) / 100

Questions fréquentes

How do I account for waste or overage?

Add 5-10% to the calculated yardage to cover spillage, uneven subgrade, or slight over-excavation.

Can I use this for round or irregular shapes?

No, this calculator is for rectangular slabs. For other shapes, break them into rectangles or use a different method.

What if my thickness is in inches but I want feet?

The calculator handles the conversion automatically. Just enter the thickness in inches.

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Résultats

Formule vérifiée

Concrete Needed

1,23cu yd

Demander n'importe quoi

Estimation à titre indicatif uniquement — vérifiez les décisions importantes avec un professionnel approprié.

Comment ça marche

Estimates the volume of concrete needed for a slab in cubic yards based on length, width, and thickness.

  1. Convert thickness from inches to feet by dividing by 12.
  2. Multiply length, width, and thickness in feet to get cubic feet.
  3. Divide cubic feet by 27 to convert to cubic yards.
  4. Round the result to two decimal places.

Formules

Les mathématiques derrière cette calculatrice, écrites pour que vous puissiez vérifier le résultat.

Volume of a rectangular slab

V = L × W × T

Multiply length, width, and thickness (all in feet) to get volume in cubic feet.

Example:

Input: L=10 ft, W=10 ft, T=4 in (0.333 ft)

Calculation: 10 × 10 × 0.333 = 33.3 cu ft

Result: 33.3 cu ft = 1.23 cu yd

Cas d'utilisation réels

Où ce calcul apparaît dans la vie quotidienne.

Patio or walkway

Plan concrete for a new patio or walkway by entering the dimensions.

Example: 10 ft × 12 ft × 4 in

Footings or foundations

Estimate concrete for footings or foundation slabs.

Example: 20 ft × 20 ft × 8 in

Driveway or garage floor

Calculate the concrete needed for a driveway or garage floor.

Example: 24 ft × 24 ft × 6 in

Conseils et erreurs courantes

Tips

  • Always order a little extra concrete (5-10%) to avoid running short.
  • Check with your supplier for minimum order quantities.
  • Use a laser level to ensure the subgrade is even before pouring.
  • Consider using rebar or wire mesh for added strength.

Common Mistakes to Avoid

  • Forgetting to convert thickness from inches to feet.
  • Not accounting for waste or over-excavation.
  • Mixing up cubic feet and cubic yards (1 cu yd = 27 cu ft).

Hypothèses et limites

  • Use the stated inputs and units.
  • Results are estimates for planning and education.
  • Check measurements and source data before making an important decision.