Enter your Tube Diameter, Tube Height, and Number of Tubes to calculate the total Concrete Volume and Bags Needed for your sonotube pour. Toggle Include Rebar and add your Rebar Diameter and Number of Rebar Sections to get an adjusted volume, plus a Total Weight estimate based on your chosen Concrete Bag Weight.
Concrete Volume
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Concrete Volume
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Bags Needed
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Total Weight
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A Sonotube is a brand of cylindrical concrete form made from spiral-wound fiber. It's used to create round concrete columns, posts, and footings by providing a temporary mold that can be stripped away after the concrete cures.
For an 8-inch diameter Sonotube that's 8 feet tall, you'll need approximately 11 bags of 80-lb concrete mix or 15 bags of 60-lb mix. The exact amount depends on the height of your specific application.
Sonotubes are available in diameters ranging from 6 inches to 48 inches, with standard lengths up to 12 feet. Custom lengths are available for special applications.
80-lb bags are more cost-effective and require fewer bags total, making them ideal for larger projects. 60-lb bags are easier to handle and better for smaller projects or when physical handling is a concern.
Yes, rebar displaces concrete volume. For large projects or when precise concrete ordering is critical, accounting for rebar displacement can save money and prevent over-ordering.
Concrete weighs approximately 150 lbs per cubic foot. A 12-inch diameter, 8-foot tall Sonotube filled with concrete would weigh around 940 lbs plus the weight of any rebar reinforcement.
Yes, Sonotubes can be easily cut with a circular saw or handsaw. Mark your desired length, ensure a square cut, and sand any rough edges before installation.
The diameter depends on your load requirements and building codes. Larger diameters provide more surface area and load capacity. Consult structural engineering guidelines or local building codes for specific requirements.