Sonotube Calculator
Your footings Tube diameter 8″10″12″14″16″18″ Depth (ft) Number of tubes Bag size 80 lb bags ($5.40)60 lb bags ($4.30)50 lb bags ($3.80) Bell-shaped base? No — straight tubeYes — belled footing (+25%) Frost depth matters: your tube must reach below the local frost line (typically 30–48″ in northern states, 12–18″ in the South). Your materials … Read more