Last updated: April 13, 2026

Sonotube Calculator

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Sonotube Foundations

Sonotubes are cardboard forms used for pouring concrete footings and columns. Calculate the amount of concrete needed for one or more tubes.

Concrete (yd³) = (π × r² × Height) / 27
in
ft
0.081
yd³
2.18
ft³
4
bags

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