Concrete Calculator

Planning a driveway, patio, or post? Accurately estimate the volume and bags of premix needed for your project.

Volume Needed

0.00

Cubic Yards

(0.0 Cubic Feet)

80lb Bags

0

60lb Bags

0

Bag estimates are approximate. Always buy 10% extra for waste.

How to Calculate Concrete

Concrete is typically measured in Cubic Yards. One cubic yard is 27 cubic feet.

Formulas

  • Slab / Rectangular:Length (ft) × Width (ft) × Depth (ft) = Cubic Feet
  • Column / Circular:π × Radius² (ft) × Height (ft) = Cubic Feet

Pro Tip: The Safety Margin

Always order or buy 5-10% more than the exact calculation to account for spillage, uneven ground, or calculation errors. It's much better to have a little left over than to run out mid-pour!