Sonotube Calculator

Concrete needed to fill a Sonotube form.

Diameter

Height

Number of tubes

Concrete volume 0.0055

Volume 0.0002

80 lb bags 1

Formula: volume = π (diameter/2)² × height × tubes

Step-by-step with your numbers:

1. Values used:

2. Diameter = 1

3. Height = 1

4. Number of tubes = 1

6. Concrete volume = 0.0055

7. Volume = 0.0002

8. 80 lb bags = Diameter x Height = 1 x 1 = 1

Did we solve your problem today?

Estimate concrete to fill cardboard Sonotube forms for piers and footings.

The math behind it

A Sonotube is a cylinder: π × radius² × height, times the number of tubes.

12 in × 4 ft → 3.14 ft³ (≈6 × 80 lb bags).

Same as a column?

Yes — a Sonotube just forms a round concrete column.