Concrete Column & Sonotube Calculator
calc_concrete_columnRead-only
Concrete needed for round columns, piers and tube forms (sonotubes). Uses cylinder volume, which differs from slab math. Formula: Cubic feet = π × (diameter(in)/24)² × height(ft) × count; cubic yards = cu ft ÷ 27 × (1 + waste%).
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| count | No | Number of columns; default 4 | |
| height_ft | No | Height (ft); default 4 | |
| waste_pct | No | Waste allowance (%); default 10 | |
| diameter_in | No | Tube diameter (in); default 12 | |
| bag_yield_cf | No | Bag yield (cu ft/bag); default 0.6 |