Q&A for How to Determine Square Inches

Divide square inches by 144 (the number of square inches in one square foot).

Area is length times width, so just multiply the two numbers together and you will know.

Multiply length by width.

Multiply length by width by depth (height).

You can take the radius which is half of the diameter, so 1, and square it, so 1, and multiply that by pi (3.141593). 1 times pi is pi so your answer would be 3.141593 square inches. You can round as you need to. The formula for area of a circle is Area=pi(radius²).

Multiply square inches by 6.45.

A radius is not measured in square inches.

Assuming the shape is square or rectangular, subtract 50 (twice 25) from 122, which equals 72. Half of that (36) is the length. Multiply the width by the length to get the area.

3" x 3" x 3" = 27 cubic inches, which is about 15 U.S. fluid ounces.

Divide square feet by 144 to get square inches.

Measure the length and width of the material in inches. Multiply length by width. That gives you the amount of material in square inches. Multiply that number by the price-per-square-inch. (The bulk weight does not matter.)

No. Including depth is used to measure the volume of a 3-dimensional object. Volume is actually measured in cubic inches, not square inches.

If you can express the curved side as a portion of a circle, then split the figure up into a piece of a circle and another regularly shaped piece. Calculate the area of each individually and add. If not -- that's what calculus is for.

If both are easily calculable: calculate the area of each region, then add. If not: You can try splitting up the two regions into bite-sized, regularly shaped chunks and adding the areas of each chunk. Or you can try thinking of them as an overlap, or a single large chunk, and subtract accordingly. Never forget the power of negative space. Or finally, be creative, geometry is all about thinking outside the box, even when you're measuring the area of the box.

The area of a circle is equal to pi times the square of the radius. The radius is half the diameter, so if the diameter is 4 inches, the radius is 2, and the radius squared is 4. So the area is pi times 4, which is approximately 12.57 square inches.

The formula for the area of an ellipse is pi multiplied by the product of the major and minor radii of the ellipse. See Calculate the Area of an Ellipse .

It depends on the room dimensions and the width of the flooring material being used. To cover a given square footage, you would need a longer linear length of narrower material than wider material.