01
Formula
Box = L × W × H. Cylinder = π × (diameter ÷ 2)² × length.
Cubic yards = cubic feet ÷ 27. Gallons = cubic feet × 7.48051948. One cubic yard is 27 cubic feet, shown on the result so the conversion stays visible.
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Volume calculator for cubic feet, yards, and gallons
This volume calculator handles a rectangular box and a cylinder. Use it as a cubic feet calculator, a cubic yard calculator, a cylinder volume calculator, or a pipe volume calculator. It also shows the cubic feet to cubic yards conversion.
Shape
Volume
24.00cu ft
Cubic yards0.889
Gallons179.53
Cubic feet in one yard27
Planning estimate from the numbers you enter. Coverage, density, waste and price are assumptions, not a supplier quote or an engineering specification.
How it works
Twenty-seven cubic feet make one yard.
A box is length times width times height, all in feet. A cylinder is the area of the circle times the length: pi times the radius squared times the height. For a pipe, use the inside diameter, not the outside, or you will include the wall. Gallons use 7.48051948 US gallons per cubic foot. Cubic yards are cubic feet divided by 27. That division is the whole cubic feet to cubic yards calculator. Material pages on this site add a depth in inches and a waste percent. This page is the geometric volume only.
02
Example
A box 4 feet by 2 feet by 3 feet.
The volume is 24.00 cubic feet, 0.889 cubic yards, and 179.53 gallons. A cylinder with a 2 foot inside diameter and a 4 foot length is the other shape. Switch to it for pipe volume. Use inside diameter.
03
Tips
Inside diameter for anything that holds liquid.
A tank or a pipe holds the interior volume. Nominal pipe size is not the inside diameter. Read the actual ID. A rectangular tank with sloped ends is not this box. Split odd shapes or treat the result as a rough upper bound.
04
Equipment
Volume is how you size a job, not a payment.
Excavators, loaders, and mixers move the material this volume describes. Dengaro finances business equipment from $15,000 to $2 million. Continue only if the machine is the purchase. The gallons are not a loan amount.
Important questions
Know what to expect.
How do I use the cubic feet to cubic yards calculator?+
Divide cubic feet by 27. The result line does that for the shape you entered. One yard is 27 cubic feet, exactly.
How should a pipe volume calculator be measured?+
Enter the inside diameter and the length of the run, in feet. Outside diameter includes metal or plastic that does not hold liquid. Nominal trade sizes need a published inside diameter.
Is the cylinder volume calculator using radius or diameter?+
You enter the diameter. The formula uses half of that as the radius. A 2 foot diameter is a 1 foot radius.
Why is the gallon figure so specific?+
A US gallon is 231 cubic inches, which is 7.48051948 gallons per cubic foot. The display rounds to two decimals after using that factor.
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