Square Footage Calculator
The Square Footage Calculator figures out the area of a plot, residence, or other surfaces using standard shapes. For irregular layouts, you can break the area into basic shapes and total their square footage.
Rectangle
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Rectangle Border
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Circle
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Ring
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Triangle with Edge Lengths
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Triangle with Base & Height
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Trapezoid
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Sector
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Parallelogram
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Reference:
1 acre = 43,560 square foot
1 square yard = 9 square foot
1 square meter = 10.76 square foot
1 square inch = 0.00064516 square foot
Calculating Cost Per Square Foot
When painting a house, installing flooring, or building a home, the square footage of the property is often used to determine the cost or materials to be used.
Painting a house:
Contractors typically quote painting jobs by the total square meters of the building. Even DIY painters can get a reliable estimate of needed paint by first measuring the space.
Painting expenses go beyond the paint itself – you must also account for brushes, solvents, prep supplies, and cleanup items. Professional estimates normally bundle these materials with labor. Consequently, bigger surfaces drive up the overall price.
Different substrates – wood, metal, plastic, etc. – often require a coat of primer to improve adhesion. Primer coverage varies, but it usually protects less area than the topcoat, typically around 200‑400 sq ft per gallon, depending on the product and application method.
Flooring installation:
Common flooring options include hardwood, laminate and tile, each with its own price range that hinges on material grade and selection.
Wood Flooring
Wood flooring includes woods such as hardwood, engineered wood (also known as composite or man-made wood), and bamboo, though bamboo is actually classified as grass.
Solid wood floors are robust, simple to maintain, and available in many styles, making them adaptable to many décor schemes. They do, however, need periodic sanding and refinishing to stay in good shape.
Engineered flooring consists of multiple wood layers topped with a thin veneer of the chosen hardwood, backed by plywood or HDF. It tolerates heat and humidity better than solid wood, requires little upkeep, and usually costs less to buy and lay.
Bamboo planks are low‑maintenance, water‑resistant, simple to fit, and come in a range of designs. While generally more affordable than classic hardwood, they can be prone to scratches from furniture legs, high heels, or stray objects.
Laminate Flooring
Laminate boards consist of a plywood or fiberboard core topped with a plastic layer that mimics hardwood. They’re cheaper, sturdy, resistant to scratches, stains and dents, and need minimal care. Installation can even go over current flooring, cutting labor and removal costs. On the downside, they feel rigid underfoot, cannot be refinished or stained, and may lower a home's resale value compared to real wood.
Tile flooring
Tile comes in forms like concrete, ceramic, glass, and natural stone, offering an extremely wide price spectrum—from under a dollar per square foot to premium figures reaching six figures. This variety lets buyers match budget and aesthetic. Tiles are low‑maintenance, easy to clean, and work in almost any room. Yet they can feel chilly without radiant heat, transmit sound, become slick when wet, crack under heavy impacts, and are hard to repair. Laying tile is labor‑intensive, often making installation pricier than the tiles themselves.
Building a home:
When building a home, using building plans and visiting different homes as a reference can help a person to gain a better understanding of what square footages work for their preferences.
Constructing a residence entails a wide range of expenses that depend on variables such as the chosen building materials, foundation type, roof slope, and numerous other attributes that don't correlate directly with the dwelling's overall size. While flooring costs can be approximated per square foot using material grade and installation fees, the sheer number of elements influencing a house's construction makes a per‑square‑foot estimate far less reliable. Consequently, averages are often used, but they may not reflect the true cost of a particular project. A more accurate approach is to request a quote from a contractor based on specific design parameters and then divide that total by the planned square footage.
Getting a per‑square‑foot price estimate for a particular project allows the owner to benchmark against another home of comparable size. Even homes with identical footprints can differ markedly in construction costs. Having such a benchmark helps a buyer decide whether to incorporate luxuries like a spacious master bathroom, marble tile work, winding staircases, or other high‑end features. Additionally, one must account for expenses beyond the building shell, including permits, labor, code‑specific requirements, and insurance.