Sonotube Calculator
Estimate the concrete volume needed for sonotube footings
Sonotube Calculator
Table of Contents
How to Use the Sonotube Calculator
Enter the diameter and height of your sonotube (cylindrical form) in centimeters, and the number of tubes. The calculator will estimate the volume of concrete needed for each tube and the total for your project.
Calculation Method
The calculator uses the following formula:
- Volume (m³) = π × (Diameter ÷ 2)² × Height
All dimensions are converted to meters for the calculation. The total volume is the sum for all tubes.
Factors Affecting Concrete Volume
- Tube size: Larger diameter and height increase volume.
- Number of tubes: More tubes require more concrete.
- Over-excavation: Holes may be deeper or wider than planned.
- Wastage: Some concrete is lost during pouring.
Practical Applications
- Pier and post foundations
- Deck and shed footings
- Fence posts
- Retaining wall supports
- Other cylindrical concrete forms
Tips for Pouring Concrete
- Order 5-10% extra concrete for safety.
- Use a concrete vibrator to eliminate air pockets.
- Pour concrete soon after mixing for best results.
- Reinforce tubes as needed for structural strength.
Frequently Asked Questions
How do I calculate the volume of a sonotube?
The volume is calculated as π × (diameter/2)² × height. Enter diameter and height in centimeters for accurate results.
How much concrete do I need for multiple sonotubes?
Multiply the volume of one sonotube by the number of tubes. The calculator does this automatically.
Should I order extra concrete?
It's recommended to order 5-10% extra concrete to account for spillage and over-excavation.