Cubic inches are the expression of the volume of a threedimensional object. For typical square or rectangular areas, multiple the length of each side in inches, according to Math.com.
A threedimensional object has three sides  often referred to as the object's length, width and depth. Use a ruler to measure each side in inches.
For a square, all three sides are the same. If a rectangular area has sides of 7 inches, 4 inches and 10 inches, multiply these together. The answer is 280.
The answer of 280 is recorded as 280 cubic inches.
You seem to be wanting a conversion into cubic inch, but have not specified from what. Here are two general conversions to cubic inch. 1 cubic centimeter = 0.061 cubic inch. 1 cubic
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The formula for cubic feet is not very difficult. The volume of the object is found by measuring cubic feet. You need to multiply the length, the width and height will give you the
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1 cubic inch is equal to 0.016387064 liters. 1 cubic centimeter is equal to
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1. Solve for Q=3*a_1–a_2^2)/9, Read, for example, a_1 as “a sub 1.”. For example, if you want to solve for z in z^3–3z^2–z+3=0, then Q= – 4/3.
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