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Concrete Volume & Materials Estimator

Concrete Weight Calculator

Estimate the volume, weight, and cost of concrete for slabs, columns, or any custom volume. Numbers update as you type.

Enter your dimensions to see the volume and weight.

Material cost only — labor and delivery not included.

How is this calculated?

Volume depends on the shape:

  • Slab: length × width × thickness
  • Round column: π × (diameter ÷ 2)² × height
  • Custom: the value you enter directly

Weight = volume × density of concrete. Normal concrete is about 2,400 kg/m³ (≈ 150 lb/ft³). Lightweight, aerated, and heavyweight mixes have different densities, which is why you can pick a type or enter your own.

Cost = volume × unit price (converted to your chosen per-unit basis). For accurate quotes, ask your local supplier for the delivered price and add 5–10% waste to your order.

Tip: Order at least 5–10% extra concrete to allow for spillage, uneven sub-grade, and slight over-pours.