Free concrete calculator

Sonotube Concrete Calculator

Estimate concrete for round piers, columns and post holes from diameter, depth and quantity.

Project inputs

Tube / hole diameter (in)

Concrete depth / height (ft)

Quantity

Waste allowance (%)

Price the whole job, not just the concrete

Add labor, materials, overhead and target margin in the Pro estimator.

See Pro Tools & Pricing

How the Sonotube calculator works

Each pier is treated as a cylinder. The calculator converts the entered diameter to a radius, multiplies the circular area by height and quantity, then converts cubic feet to cubic yards and applies your waste allowance.

Verify actual excavation size, bell bottoms, overbreak, tube dimensions and supplier requirements before ordering concrete.