How to use it
- Enter the inside diameter in inches.
- Enter the height in inches.
- Click Calculate to see volume in cubic inches, cubic feet, and gallons.
Sonotube pipes are common for footings and concrete columns. This calculator takes the tube’s inside diameter and height, then instantly returns the volume in three units you’ll use on the job site: cubic inches, cubic feet, and gallons. Knowing the exact volume helps you order the right amount of concrete, avoid costly over‑orders, and keep waste low. The tool uses the standard cylinder formula V = π r² h, converts 1 ft³ = 1,728 in³ and 1 gal = 231 in³, so the numbers match what suppliers quote. Read the cubic‑inch result for quick checks, then use the cubic‑foot figure for ordering bags, and the gallon value for small‑scale mixes or estimating pump capacity. You can also compare multiple tube sizes side‑by‑side by entering different diameters and heights, which speeds up planning for larger projects. Because the calculator works in the same units that concrete suppliers use, you can copy the result straight into a purchase order without extra conversions.
Pro tips
- Add 5‑10% extra volume for waste and spillage.
- Round up to the nearest whole bag when ordering concrete.
- Use the cubic‑foot result for bulk orders, gallons for small mixes.
- Double‑check the diameter measurement; the calculator assumes inside diameter.
Real-life examples
- A contractor estimating concrete for a new deck footing.
- A DIY homeowner planning a garden retaining wall column.
- A site manager comparing volume of different Sonotube sizes for a multi‑story building.
Case study
Mike needed 12 ft³ of concrete for a footing but kept over‑ordering. After entering his Sonotube dimensions, the calculator showed 11.8 ft³ (≈2,040 gal), so he ordered exactly what he needed, saving $250 and reducing waste.