Concrete Pier Calculator
Calculate cylindrical concrete quantity for a pier using measured diameter and fill depth, including your chosen allowance; structural sizing is excluded.
Reference calculation or estimate for example inputs; assumptions and limitations apply.
Calculations run in your browser.
What to enter
| Input | Meaning and units |
|---|---|
| Internal diameter (m) | Enter internal diameter in m; use the same basis as the other measurements. |
| Height or depth (m) | Enter height or depth in m; use the same basis as the other measurements. |
| Extra volume allowance (%) | Enter percentage units: 5 means 5%, not a fraction of 0.05. |
Understanding your result
The answer estimates quantity, coverage or cost from the dimensions and allowances you entered. It does not size a structural member, assess capacity or determine installation adequacy.
Common mistakes
- Mixing centimetres with metres, or outside dimensions with the actual filled volume.
- Treating allowance, compaction, supplier yield and density as interchangeable adjustments.
Check your calculation
- Measure independently, subdivide irregular shapes, and compare supplier pack/yield information with the units used here.
Calculation checks, sources and review limits
How much concrete fills a cylindrical pier at my measured dimensions?
Calculate cylindrical concrete quantity for a pier using measured diameter and fill depth, including your chosen allowance; structural sizing is excluded.
Common uses
- How much concrete fills a cylindrical pier at my measured dimensions
- Check cylinder volume and volume with allowance using the actual inputs shown.
How it works
Treat the measured pier void as a cylinder: volume equals pi times radius squared times measured fill depth. Use matching length units and enter the diameter, not the radius. Multiply by one plus the extra-volume percentage divided by 100 to obtain the allowance scenario. Excavation irregularities can change actual quantity; foundation sizing, soil bearing and structural adequacy are excluded.
Worked example
Enter Internal diameter: 2 m; Height or depth: 1 m; Extra volume allowance: 0 %. Results: Cylinder volume: 3.141592653589793 m³; Volume with allowance: 3.141592653589793 m³.