Understanding Area
Area is the amount of two-dimensional space inside the boundaries of a shape. It is expressed in square units, such as square inches, square feet, square yards, square meters, acres, or hectares. Area measurements are commonly used to estimate materials for flooring, paint, landscaping, sheet goods, paving, construction projects, and many other jobs where surface coverage matters.
Choosing the Right Shape
Accurate area calculations start by identifying the shape that best represents the space you are measuring. Rectangles and squares are common for rooms, walls, panels, and garden beds. Circles can represent round patios, tabletops, or planting areas, while triangles and trapezoids are useful for sloped or tapered sections. Ellipses can be used for oval-shaped areas and layouts.
Measuring Irregular Areas
Many real-world spaces are not perfect geometric shapes. An irregular floor, yard, wall, or workpiece can often be divided into several simpler shapes. Calculate the area of each section separately, then add the results together to estimate the total area. If part of the space should not be included, calculate that section separately and subtract its area from the total.
Area vs. Perimeter
Area and perimeter describe different measurements. Area measures the space inside a shape, while perimeter measures the distance around its outside edge. For example, flooring is normally estimated using area, while trim, edging, fencing, or border material may depend on perimeter. A project may require both measurements, so make sure you use the result that matches the material being estimated.
Allowing for Extra Material
The calculated area represents the geometric size of the space and does not automatically include extra material for cuts, waste, overlap, breakage, pattern matching, or mistakes. When buying flooring, tile, landscaping material, sheet goods, or similar products, consider adding an appropriate waste allowance based on the type of project and material being used.