Printable jobsite chart

Sonotube Concrete Bag Chart

Download a quick reference for common round tube form diameters and depths, including 60 and 80 lb bag counts with 10% waste.

US units 10% default waste Bag and yard estimates

Printable reference

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Use this chart to sanity-check common straight tube forms before buying bagged concrete or discussing cubic yards with a ready-mix supplier.

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Source note: counts assume a straight round tube, 10% waste, and approximate bag yields. Confirm inside diameter, fill depth, footing design and bag yield before checkout.

Sonotube concrete bag chart for round tube forms and deck piers

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Estimate assumptions

Estimates are for planning and ordering only.
Bag counts are rounded up to whole bags.
Ready-mix yards are rounded up to the nearest 0.25 cubic yard.
Default waste is 10%. Increase it for uneven excavation, spillage, or complex forms.
Verify structural work with a contractor, engineer, or supplier before pouring.

Method and assumptions

The chart treats each tube as a full concrete cylinder: pi times radius squared times depth. It does not include bell footings, flared bases, pads, or post displacement.

Bag counts use 60 lb = 0.45 cu ft and 80 lb = 0.60 cu ft. A 10% waste factor is added before each bag count is rounded up.

Source links

QUIKRETE quantity calculatorhttps://www.quikrete.com/calculator/main.asp
Sakrete concrete calculatorshttps://www.sakrete.com/concrete-calculators/
Sonotube concrete form product guidancehttps://www.sonotube.com/

Before you pour

Confirm the tube's inside diameter, actual fill depth, footing design, frost depth and local code requirements before ordering material.

For deck footings, structural piers, inspection-sensitive work or large-diameter forms, verify the estimate with the plans, supplier, contractor or engineer.

Common next purchases

Concrete mix Rebar Tube forms Mixing tools Trowels and floats

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FAQ

How many bags for a 12 inch Sonotube?

A 12 in diameter by 48 in deep tube rounds to 6 bags of 80 lb concrete with 10% waste.

Does the chart include a flared base?

No. It estimates the straight tube only. Estimate bell footings, flared bases or pads separately.

Can I embed this chart?

Yes. Use the embed code on this page and keep the source link to Pour Calculator.