Content of the material
 Calculating Cost Per Square Foot
 Painting a house:
 Flooring installation:
 Building a home:
 Video
 How To Measure Square Footage Of A House In 3 Steps
 Square Footage Of A House Example
 Ask The Pros
 How to find the square footage of a triangle
 How many square feet is a 20×20 room?
 Converting Square Footage to Yards
 How to calculate square footage?
 Square Footage Formulas and Images for Different Areas
 Calculate square footage for a circle border area
 Calculate square footage for a annulus area
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:
Professional house painters often base price quotations on the square footage of a property. Alternatively, even if a person plans to paint their house themselves, measuring square footage can yield accurate estimates of the amount of paint required.
Total cost encompasses more factors than the just amount of paint required, including the cost of materials such as brushes, turpentine, and any materials necessary for preparing, mixing, applying, and cleaning up paint. These considerations are typically included in a quote from a professional painter, in addition to labor costs. Accordingly, the larger the size of a property or area, the higher the cost required to paint it.
Depending on the surface being painted, whether wood, metal, plastic, or something else, paint primer, which helps the paint adhere more effectively to a given surface, can be used. While the amount of coverage provided by primer or paint depends heavily on the method of application, type, and brand of paint, primer generally covers less area than paint, and estimated coverage amounts can range from anywhere between 200400 square feet per gallon.
Flooring installation:
There are a number of materials commonly used for flooring, including wood, laminate, and tile. Flooring costs can vary significantly depending on the quality and choice of materials.
Wood Flooring
Wood flooring includes woods such as hardwood, engineered wood (also known as composite or manmade wood), and bamboo, though bamboo is actually classified as grass.
Hardwood flooring is highly durable, easy to clean, and can be found in a variety of different appearances. As such, it is fairly versatile in terms of interior design, but does require some maintenance such as sanding and refinishing over time.
Engineered wood flooring is made from several layers of wood, with a thin outermost layer of the desired hardwood, and inner layers such as plywood and highdensity fiberboard. Engineered hardwood has a higher heat and moisture resistance than solid hardwoods, is easy to maintain, and is generally cheaper to purchase and install than hardwood flooring.
Bamboo flooring is easy to maintain, moisture resistant, easy to install, and is available in many different styles. It is often cheaper than traditional hardwood options, but does have the disadvantage of scratching easily as a result of furniture, high heels, claws, or even debris.
Laminate Flooring
Laminate flooring is typically made with plywood or fiberboard with a plastic laminate top layer, and can have a similar look like hardwood. It is less costly than traditional wood flooring, is highly durable, difficult to scratch, stain, or dent, and requires little maintenance. Laminate flooring can even be installed over existing flooring, which can save time as well as the cost of removing old flooring. However, laminate flooring often feels too hard on the feet, cannot be finished or stained – meaning that the owner is stuck with what they choose and will have to entirely replace the floor if they change their mind – and also results in a lower resale value for a home than traditional hardwoods.
Tile flooring
Tile flooring includes concrete or cement, ceramic tiles, glass tiles, and natural stone products among many others. Due to the numerous varieties of tile, there is an incredibly large price range, from 60 cents per square foot, to hundreds of dollars, or even $100,000 per square foot. The many options of tile allow a person to choose a cost and style that best fits their needs. Tile is also easy to maintain, clean, and is suitable for all locations. However, without heating, tile can be cold in the winter. It also does not dampen sound, can be slippery when wet, can break if heavy objects are dropped on them, and cannot easily be repaired. Tile installation is also difficult, and installation costs can be more expensive than the cost of the materials.
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.
The cost of building a home varies largely based on a number of factors, including materials, the type of foundation, the pitch of the roof, and many other characteristics that are not necessarily directly related to the size of the house. Unlike the cost per square foot of installing flooring, which can be estimated based on material, quality, and installation costs, the multitude of factors involved in building a house makes it more difficult to estimate cost per square foot. As such, cost per square foot is often estimated based on averages, and depending on a person’s specific project, it may not be an accurate estimate of the cost. Instead, it may be more helpful to get an estimate from a builder based on some given specifications, and divide that estimate by the number of square feet the house will occupy.
Obtaining an estimate of the cost per square foot for a person’s specific project can allow comparison to a different house of similar size as a reference. As previously mentioned, houses of the same size do vary significantly in building cost. Thus, having a reference can help a prospective owner decide whether or not to include an elegant master bath, marble tiles, curved staircases, or any other more extravagant features. There are also a number of costs outside of building the house that should be considered, such as fees to local authorities, labor, special requirements from building codes, and insurance.
Video
How To Measure Square Footage Of A House In 3 Steps
To calculate the square feet of a house, you will need to determine each room’s area and add it together. It sounds easy, right? We’re going to try to keep it that way as we walk you through the process. Gather a few tools before getting started:

Tape Measure

Notepad and pen/pencil

Calculator
You may also want someone to assist as you measure, especially in larger rooms. While it all depends on the shape of your house and the complexity of your floor plan, sometimes it’s a good idea to start this endeavor with a helping hand. When you are ready to get started, there are three steps to follow:

Measure the length and width of each room and hallway in your house.

Multiply the length and width of each room separately, which you can write down before your final calculations.

When you are done measuring and multiplying, add the area of each room together.
Square Footage Of A House Example
For example, pretend you live in a ranch home in the shape of a rectangle. The length of the house is 70 feet, and the width is 50. This means to calculate the square footage, you will multiply 70 by 50, resulting in a final calculation of 3,500 square feet. Of course, not every home is a perfect rectangle — making it more timeconsuming to get accurate numbers. That’s why going room by room is often the most practical method. With the proper measurements and some addition, you can still calculate the square footage of your home.
Ask The Pros
Learning how to calculate the square feet of a house can be a challenging task. Thankfully, there are experts to help you. It is common practice to hire a professional appraiser to accurately measure your home. Depending on the property’s size, the cost of an appraiser to measure the square footage can range from $100 to several hundred dollars. When an appraiser calculates the square feet of a house, they also only include areas that are heated and cooled. While two different appraisers will sometimes have different measurements on square footage, there is usually only a 13% variance. Appraisers will do their best to calculate square footage with scientific accuracy.
How to find the square footage of a triangle
 Measure the length of the base and the height of the triangle in feet.
 Multiply your base and height measurements together.
 Divide your total by two to get the square footage of the triangle
The formula for calculating the square footage area of a triangle is: base × height / 2. To work out your cost of materials, simply multiply this figure by your 'price per square foot'.
How many square feet is a 20×20 room?
The square footage of a room measuring 20 feet wide by 20 feet long is 400 square feet. To calculate this you simply multiply the width by the height. 20ft × 20ft = 400 sq ft.
Converting Square Footage to Yards
Sometimes you run into situations where things are measured in yards. (You “metric people” can feel free to roast us Americans in the comment section all you want, but it won’t change anything). All the math above works exactly the same. A driveway 50yards long and 12yards wide is 600yards because 50 x 12 = 600.
A football field is 120 yards long by 160 feet wide if you include the end zones. When doing math with two different units of measurement (feet and yards in this case), you need to do a conversion. If we take 160 (feet) and divide it by 3, that tells us the width of the football field in yards.
160 ÷ 3 = 53.33 yards. Next, we can simply multiply 120 x 53.33. Do that, and you get ~6,400 square yards of football field. The approximation comes from the fact that 160 ÷ 3 is not really 53.33 yards but actually 53.333333… When estimating, getting close works perfectly because you typically want to add 10% on top anyway to cover waste.
What if your boss then changes his or her mind (as they are known to do)? They now say they want to know the football field in square feet. You can redo the math by multiplying 120 x 3 which gives you 360 feet. Then, take 360 and multiply it by 160 feet to get 57,600 square feet (incidentally, that’s about 1.32 acres).
How to calculate square footage?
It’s easy. Follow these steps.
Measure the length in feet, Measure the width in feet. Multiply the length figure by the width figure. This will be your total square footage for that portion of your project. Continue to repeat this for all parts of the space that will get the same tile. Add these together for your total square footage.
Measuring in inches works as well. Do the math the same way, then divide by 144 to get your total in square feet. When calculating square footage account for the entire space (i.e. under vanity/cabinets).
Square Footage Formulas and Images for Different Areas
Using measurements in feet: Area (ft) = Side Length x Side Length
Using measurements in feet: Area (ft) = Length x Width
Using measurements in feet: Inner Area (ft) = Length x Width Total Area (ft) = (Length + (2 x Border Width)) x (Width + (2 x Border Width)) Area (ft) = Total Area – Inner Area
Using measurements in feet: Area (ft) = Pi x (Diameter/2)^2 Pi = 3.14
Calculate square footage for a circle border area Using measurements in feet: Outer Diameter = Inner Diameter + (2 x Border Width) Outer Area (ft2) = Pi x (Outer Diameter/2)^2 Inner Area (ft2) = Pi x (Inner Diameter/2)^2 Area (ft2) = Outer Area – Inner Area Pi = 3.14 Obviously, the Circle Border and Annulus are the same, just measured differently.
Calculate square footage for a annulus area Using measurements in feet: Outer Area (ft2) = Pi x (Outer Diameter/2)^2 Inner Area (ft2) = Pi x (Inner Diameter/2)^2 Area (ft2) = Outer Area – Inner Area Pi = 3.14 Obviously, the Circle Border and Annulus are the same, just measured differently.
Using measurements in feet: Area (ft) = (1/4) x square root[ (a+b+c) x (b+ca) x (c+ab) x (a+bc) ]
Using measurements in feet: Area (ft) = ((a + b) / 2 )h