To find the volume of a rectangular prism, multiply its 3 dimensions: length x width x height. The volume is expressed in cubic units.

When we determine the surface areas of a geometric solid we take the sum of the area for each geometric form within the solid. To find the volume of a prism (it doesn’t matter if it is rectangular or triangular) we multiply the area of the base, called the base area B, by the height h.

Measure the length, width and height of the box in inches. 2. Multiply the length, width and height and divide the resulting number by 1,728. This is the container’s volume in cubic feet.

How to Calculate Cubic Feet

1. volume = length × width × height.
2. cu ft = cu in ÷ 1,728.
3. cu ft = π × radius2 × height.
4. volume = area × height.

Compute the volume of a rectangular prism with the following formula: Volume = length times width times depth. For example, suppose you had a rectangular prism with the dimensions 3 feet by 4 feet by 5 feet. Multiply the dimensions together to obtain 60 cubic feet.

Volume of Wood The cubic feet, or volume, of a cylindrical log is given by the volume of a cylinder V=πhr2. A log with radius of 2 feet and height of 10 feet would have a volume of about 125.66 cubic feet (or ft3).

Smalian’s formula states that the volume of a log can be closely estimated by multiplying the average of the areas of the two log ends by the log’s length.

Ex. Main door size 3–3 x 7–0, Frame size 0′–5″ x 0′–4″. Wood quantity = ( 2 x 3.25 + 2 x 7 ) x 5 x 4 / 144 = 2.85 Cu. Ft….

1. 7′(2 nos.)+ 3′(2 members)=21′(with wastage)
2. Each length of 4″ thickness and 5″.
3. Volumne:21′x4″x5″= 3 Cft of wood.