How many square feet in 16x20

How many square feet for a 11 feet wide by 20 feet long room? Square footage is calculated by multiplying width by length. So if a room is 11 foot wide by 20 foot long, 11 x 20 = 220 square feet. Square footage calculators can be used for tiles, carpet flooring, paint, a room, house square footage or general area calculations.

To calculate feet squared (or sq. ft. for short), determine the length and width of the area you are working with, measured in feet. Multiply the length by the width and you'll have the square feet. Here's a basic formula you can follow: Length (in feet) x width (in feet) = area in sq. ft. Tip: If you can't picture what a square foot is ...To convert linear footage to square footage, use the following area to length formula: length = area ÷ width. For example, if you were using 3 x 6 tiles as a border, and there are 8 square feet in a box, 8 square feet divided by the width of the material (6″) gives us 16 linear feet of 3 x 6 tile in one box.How many square inches are in 35 square feet? There are 144 square inches in a square foot. This calculates out to be 5,040 square inches. ... How square feet is 16x20 square meters? 3,444.45133 square feet. Convert 40 x 50 cm to inches? 16x20. What is 250 square feet equal to? Square footage is calculated by multiplying width by length. So if a room is 18 foot wide by 20 foot long, 18 x 20 = 360 square feet. Square footage calculators can be used for tiles, carpet flooring, paint, a room, house square footage or general area calculations. How to convert square feet to cubic yards. To convert square feet to cubic yards, simply multiply your square footage figure by the height or depth of the area (in feet) to get a volume measurement in cubic feet. Next, divide the total by 27 to get your measurement in cubic yards. Should your height or depth figure be in inches, simply divide ...For instance, pressure-treated pine is the least expensive option among your choices for natural wood decking, with a cost of approximately $3 to $6 per square foot. More exotic hardwoods – such as Redwood or Ipe can range between $7 to $15 per square foot. Composite decking, such as Trex, can cost between $5 to $13 per square foot, however ...In northern regions, large sod rolls (60 x 24 or 80 x 18 inches) cover 10 sq. ft. each, with pallets ranging from 500 to 700 sq. ft. For tall fescue and Kentucky bluegrass, consider price per square foot due to variable pallet sizes. Slab sizes result in pallets of 400, 450, or 500 sq. ft., with sod farms sometimes adding an extra slab to ...

Summary. How many square feet for a 14 feet wide by 20 feet long room? Square footage is calculated by multiplying width by length. So if a room is 14 foot wide by 20 foot long, 14 x 20 = 280 square feet. Square footage calculators can be used for tiles, carpet flooring, paint, a room, house square footage or general area calculations.Enter the number of square feet to convert into acres. Easy sq ft to acres conversion. Amount. From. To. Calculate. swap units ↺. 1 Square Foot ≈. 0.000022956841 Acres.Square footage = Length (feet) × Width (feet) To give an example, if a bedroom measures 16 feet by 12 feet, the calculation would be 16 multiplied by 12, resulting in a square footage of 192 (16 × 12 = 192).The calculation to work out the square feet of both a square and rectangular room like 16x40 is very simple. All you need to do is multiply the length by the width. Square Feet = Length x Width. 16 x 40 = 640. This means the answer is:Danny, Uh oh! My contractor just finished laying 122 square feet of porcelain floors directly over plywood in my kitchen. When I had asked him if he Expert Advice On Improving Your...How many feet is 1 plywood? Generally, a plywood sheet is 4 × 8 ft , which is 32 square feet in area. In meters, it is roughly equal to 1.2 × 2.4 m (so 2.88 m² ).

How many square feet for a 30 feet wide by 10 feet long room? Square footage is calculated by multiplying width by length. So if a room is 30 foot wide by 10 foot long, 30 x 10 = 300 square feet. Square footage calculators can be used for tiles, carpet flooring, paint, a room, house square footage or general area calculations.Square Footage = Length (feet) x Width (feet) What is the area of a 15x30 pool? The area of a 15x30 pool is 450 square feet. How many square meters is a swimming pool? It depends on the size of the pool. To convert square feet to square meters, you can use the conversion factor: 1 square meter = 10.764 square feet. How many square feet is a ...6 days ago · To calculate the square footage of the deck, multiply the two numbers together: 20 ft × 13 ft = 260 ft². You chose a board that is 8 ft long and 6 in wide. Convert the width from inches to feet – simply divide the value by 12: 6 in / 12 = 0.5 ft. Let's calculate the square footage of one decking board: 8 ft × 0.5 ft = 4 ft² In general, there are about 450 square feet of turf grass in a pallet of sod. But this amount can vary depending on the type of sod and how it is cut. Slab Cut Turf. Warm season grasses, such as zoysia and centipede, are usually cut in rectangular slabs. These slabs typically measure 16 inches by 24 inches. Each slab covers 2.66 square feet.Summary. How many square feet for a 15 feet wide by 25 feet long room? Square footage is calculated by multiplying width by length. So if a room is 15 foot wide by 25 foot long, 15 x 25 = 375 square feet. Square footage calculators can be used for tiles, carpet flooring, paint, a room, house square footage or general area calculations.

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Exactly 43560 square feet equal one Acre, since an acre was originally defined as the area of a rectangle with sides of 66 and 660 feet (66 x 660 = 43560). The modern definition of the acre was established via an international treaty in 1959, according to which the symbol for acre is "ac" and the symbol for square feet is "ft 2 ", often written ...Square footage is calculated by multiplying width by length. So if a room is 12 foot wide by 20 foot long, 12 x 20 = 240 square feet. Square footage calculators can be used for tiles, carpet flooring, paint, a room, house square footage or general area calculations.How many square feet for a 20 feet wide by 10 feet long room? Square footage is calculated by multiplying width by length. So if a room is 20 foot wide by 10 foot long, 20 x 10 = 200 square feet. Square footage calculators can be used for tiles, carpet flooring, paint, a room, house square footage or general area calculations. Square footage = Length (feet) × Width (feet) To give an example, if a bedroom measures 16 feet by 12 feet, the calculation would be 16 multiplied by 12, resulting in a square footage of 192 (16 × 12 = 192). Once you have your square footage figure, you can work out what materials you might need.

Square foot. Definition: A square foot (symbol: sq ft) is a unit of area used in the imperial and US customary systems (UCS). It is defined as the area of a square with one-foot sides. One square foot equals 144 square inches. History/origin: The origin of the square foot can be seen in the term itself. It is a measurement derived from the area of a square with a side length measured in feet.To convert linear footage to square footage, use the following area to length formula: length = area ÷ width. For example, if you were using 3 x 6 tiles as a border, and there are 8 square feet in a box, 8 square feet divided by the width of the material (6″) gives us 16 linear feet of 3 x 6 tile in one box.How to Calculate Square Inches. Square inches are a unit of area measurement of a space. They are also referred to as inches squared. One square inch is equal to the area of a square with each side equal to one inch in length. Of course, not all areas are perfect squares, but you can still calculate the area in square inches of a variety of shapes.Convert inches into feet, 20 in × 1 / 12 = 1 2 / 3 ft, and multiply this by the square footage to move from square feet to cubic feet, 1600 ft² × 1 ⅔ ft = 2666 ⅔ ft³. It is difficult to move from square feet to cubic yards, so now that we have the cubic feet, multiply it by the conversion ratio 1 / 27: 2666⅔ ft³ × 1 / 27 = 98.77 yd³.Select a Calculator. Please enter values in the input to get it convert into square feet then press "Calculate". Area Shape: Length. Width. Price (Optional) Are you looking to calculate square feet for irregular shape / …Square footage is calculated by multiplying width by length. So if a room is 10 foot wide by 7 foot long, 10 x 7 = 70 square feet. Square footage calculators can be used for tiles, carpet flooring, paint, a room, house square footage or general area calculations.How many 16 x 16 inch pavers would you need for 160 square ft? 90 pavers. First, convert 16 inches (the length of the side) into feet so that you can work with all of the numbers in the same way. 16 inches/12 inches per foot = 1.333 feet.The calculation to work out the square feet of both a square and rectangular room like 12x16 is very simple. All you need to do is multiply the length by the width. Square Feet = Length x Width. 12 x 16 = 192. This means the answer is:

Paint Calculator. Before you or your contractor buy paint, find out exactly how much you'll need. If more than one room is being painted with the same color, add up the total square footage. PLEASE NOTE: These calculations are not intended to give more than a rough estimate. Precise paint needs will vary according to many factors, including ...

Square footage = Length (feet) × Width (feet) To give an example, if a bedroom measures 16 feet by 12 feet, the calculation would be 16 multiplied by 12, resulting in a square footage of 192 (16 × 12 = 192). Once you have your square footage figure, you can work out what materials you might need. Summary. How many square feet for a 15 feet wide by 25 feet long room? Square footage is calculated by multiplying width by length. So if a room is 15 foot wide by 25 foot long, 15 x 25 = 375 square feet. Square footage calculators can be used for tiles, carpet flooring, paint, a room, house square footage or general area calculations. A 20 x 20 area is 400 sq feet. This could be used to calculate the square footage of any rectangular area such as a living room, bathroom, backyard, park, or floor area. Square footage is also commonly used to estimate the cost of material needed for painting, flooring, and other types of construction. The most common size is 14×70, which equals 980 square feet. One can also find mobile homes that are 14×80, which equal 1120 square feet. A 16×80 mobile home would have 1280 total sq. ft. and a 20×80 mobile home would have 1600 total sq. ft. The average cost to buy a new mobile home ranges from $50,000-$130,000 depending on the quality and ...How many square feet for a 18 feet wide by 18 feet long room? Square footage is calculated by multiplying width by length. So if a room is 18 foot wide by 18 foot long, 18 x 18 = 324 square feet. Square footage calculators can be used for tiles, carpet flooring, paint, a room, house square footage or general area calculations.Summary. How many square feet for a 25 feet wide by 15 feet long room? Square footage is calculated by multiplying width by length. So if a room is 25 foot wide by 15 foot long, 25 x 15 = 375 square feet. Square footage calculators can be used for tiles, carpet flooring, paint, a room, house square footage or general area calculations.How many Square Feet in a Square Meter? Difference between Feet and Meters; How to convert Square Feet to Square Meters How many Square Feet in a Square Meter? There are approximately 0.09290304 square feet in a square meter, since a foot is defined as 0.3048 meters, thus a meter is 1/0.3048 feet and a square meter is 1/0.3048 squared. The ...Convert inches into feet, 20 in × 1 / 12 = 1 2 / 3 ft, and multiply this by the square footage to move from square feet to cubic feet, 1600 ft² × 1 ⅔ ft = 2666 ⅔ ft³. It is difficult to move from square feet to cubic yards, so now that we have the cubic feet, multiply it by the conversion ratio 1 / 27: 2666⅔ ft³ × 1 / 27 = 98.77 yd³.square feet = square inches ÷ 144. The area in square feet is equal to the area in square inches divided by 144. For example, here's how to convert 500 square inches to square feet using the formula above. square feet = (500 sq in ÷ 144) = 3.472222 sq ft. Square inches and square feet are both units used to measure area.Garden bed height: feet. Calculate Triangle Area. square feet. Garden bed radius: feet. Calculate Circle Area. square feet. Use several basic shapes to fill as much of the irregular bed as possible. Measure and use the calculators for each one then add them together to get the square footage for the entire bed. Published: Aug. 6, 2018.

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Single and double rolls of 20.50" width paper are usually 16.5' long and 33' long, respectively. While single and double rolls of 27" width paper are usually 13.5' long and 27' long, respectively. Depending on the wallpaper sheet width, a double roll covers 57 to 61 square feet, while a single roll is 29 to 31 square feet.To find square feet means to find out the area of the room. Your room appears to be rectangular from the dimensions. Therefore, to find the area of the room, we will use the following formula: Area = Length x Width. Area = 20 x 16. Area = 320 square feet. Therefore, the square footage of your room is 320 square feet or 320 feet 2 .Since one square yard is equal to 9 square feet, you can use this simple formula to convert: square feet = square yards × 9. The area in square feet is equal to the area in square yards multiplied by 9. For example, here's how to convert 5 square yards to square feet using the formula above. square feet = (5 sq yd × 9) = 45 sq ft.Convert inches into feet, 20 in × 1 / 12 = 1 2 / 3 ft, and multiply this by the square footage to move from square feet to cubic feet, 1600 ft² × 1 ⅔ ft = 2666 ⅔ ft³. It is difficult to move from square feet to cubic yards, so now that we have the cubic feet, multiply it by the conversion ratio 1 / 27: 2666⅔ ft³ × 1 / 27 = 98.77 yd³.For example, to know how to find the square feet of a circle with a 1524 cm radius, follow these steps:. Convert 1524 cm to ft by dividing it by 30.48. The radius in cm would be: (1524/30.48) ft = 50 ft. Learn more about this in our length converter.. Input the radius in the SF formula:. SF = π(50 ft)² = 7854 ft²Let's start with a square. It is simply an area unit covering 100 ft², so if you'd like to calculate a roof's area in squares, you'd simply divide the roof area in feet by 100 and, most likely, round it up: roof area in squares = roof area in feet / 100.Last updated: October 8, 2023. Calculate square footage, square meters, square yardage and acres for home or construction project. Calculate square feet, meters, yards and acres for flooring, carpet, or tiling …Determine the width and length. Length can also be height. If your width and length are not measured in feet convert measurements into feet. For inches divide by 12. For yards multiply by 3. For centimeters multiply by 0.03281. For meters multiply by 3.281. Finally, multiply Length (ft) x Width (ft) = Square Footage.How many square feet for a 14 feet wide by 30 feet long area? Square footage is calculated by multiplying width by length. So if a area is 14 foot wide by 30 foot long, 14 x 30 = 420 square feet. Square footage calculators can be used for tiles, carpet flooring, paint, a room, house square footage or general area calculations.There are about 10.7639 square feet per square meter. The easy way to estimate is to drop a zero. So, if a property or hotel room has 16 square feet, that is equal to 1.4864500785031 m2 or can be estimated at 1.6 m2. Square Footage.Quick conversion chart of inches inches to square feet. 1 inches inches to square feet = 0.00694 square feet. 10 inches inches to square feet = 0.06944 square feet. 50 inches inches to square feet = 0.34722 square feet. 100 inches inches to square feet = 0.69444 square feet. 200 inches inches to square feet = 1.38889 square feet. 500 inches ... ….

Square footage is calculated by multiplying width by length. So if a room is 10 foot wide by 7 foot long, 10 x 7 = 70 square feet. Square footage calculators can be used for tiles, carpet flooring, paint, a room, house square footage or general area calculations.≈ 1.07639 x 10 1 square feet. Square Meters. A square meter, or square metre, is a unit of area. It is the size of a square that is one meter on a side. It is approximately 10.76 square feet. Common abbreviations: sq m, m², m^2. Square Feet. A square foot is a unit of area. It is the size of a square that is one foot on a side.How many square feet for a 11 feet wide by 20 feet long room? Square footage is calculated by multiplying width by length. So if a room is 11 foot wide by 20 foot long, 11 x 20 = 220 square feet. Square footage calculators can be used for tiles, carpet flooring, paint, a room, house square footage or general area calculations.The 300-page shopper's guide is one of the world’s most-distributed books. Earlier this month, IKEA arrived in India with a 400,000 square feet store, 7,500 products, and big expan... If length and height of an object are equal, the object is called Regular polygon. The formula: size in feet = square root (square feet); square feet of an object = height in feet * width in feet = size in feet * size in feet = size 2 in square feet. Guest: 2020-07-15 12:01:09 It is interesting to find out, why foot is equal to 30.48 cm. If you need to convert to cubic feet from inches: divide the final number (i.e. the total you get after multiplying the three dimensions together) by 1728. If you need to convert to cubic feet from meters/metres: multiply your final …How many square feet for a 10 feet wide by 18 feet long room? Square footage is calculated by multiplying width by length. So if a room is 10 foot wide by 18 foot long, 10 x 18 = 180 square feet. Square footage calculators can be used for tiles, carpet flooring, paint, a room, house square footage or general area calculations.Square footage is calculated by multiplying width by length. So if a room is 12 foot wide by 26 foot long, 12 x 26 = 312 square feet. Square footage calculators can be used for tiles, carpet flooring, paint, a room, house square footage or general area calculations. How many square feet in 16x20, Summary. How many square feet for a 10 feet wide by 12 feet long room? Square footage is calculated by multiplying width by length. So if a room is 10 foot wide by 12 foot long, 10 x 12 = 120 square feet. Square footage calculators can be used for tiles, carpet flooring, paint, a room, house square footage or general area calculations., From there, multiply the length and width together to arrive at the total square footage of your deck. For instance, if the longest point of your deck is 20 ft and the widest point of your deck is 16 feet, your deck's total square footage would be 320 square feet. 20 ft (length) x 16 ft (width) = 320 sq. ft. When building a deck from the ..., The calculator will indicate the number of 10.1 oz. tubes of QUIKRETE ® Polyurethane Concrete Crack Sealant or 10.1 oz tubes of Concrete Repair you will need for your project. Enter the Length of the Crack in Feet: For 1/4 inch Wide Joint by 1/4 inch Deep: Number of 10.1 oz Tubes: For 1/2 inch Wide Joint by 1/4 inch Deep:, Paint Calculator. Before you or your contractor buy paint, find out exactly how much you'll need. If more than one room is being painted with the same color, add up the total square footage. PLEASE NOTE: These calculations are not intended to give more than a rough estimate. Precise paint needs will vary according to many factors, including ..., **This Calculator also calculates square inches, total height in feet, total height in inches, total length in feet and total length in inches. What is a Square Foot? A "square foot" is a unit of area measurement equal to a square measuring one foot on each side. 1 Square Foot = 0.0929 square meters., How many square feet for a 13 feet wide by 13 feet long room? Square footage is calculated by multiplying width by length. So if a room is 13 foot wide by 13 foot long, 13 x 13 = 169 square feet. Square footage calculators can be used for tiles, carpet flooring, paint, a room, house square footage or general area calculations., Summary. How many square feet for a 14 feet wide by 10 feet long room? Square footage is calculated by multiplying width by length. So if a room is 14 foot wide by 10 foot long, 14 x 10 = 140 square feet. Square footage calculators can be used for tiles, carpet flooring, paint, a room, house square footage or general area calculations., How many square feet for a 20 feet wide by 10 feet long room? Square footage is calculated by multiplying width by length. So if a room is 20 foot wide by 10 foot long, 20 x 10 = 200 square feet. Square footage calculators can be used for tiles, carpet flooring, paint, a room, house square footage or general area calculations. , What is the square footage of a 16 foot by 20 foot rectangle? How big is a 16 x 20 rectangle? 16 ft by 20 ft room in square feet. Use this easy and mobile-friendly calculator to compute the area of a rectangle given the length of its sides., Square footage is calculated by multiplying width by length. So if a room is 10 foot wide by 6 foot long, 10 x 6 = 60 square feet. Square footage calculators can be used for tiles, carpet flooring, paint, a room, house square footage or general area calculations., 2x4 Calculator Costs Formula. To calculate the lumber price [1] per linear foot, multiply the number of linear feet by the price per foot. Here is the equation behind the calculator: Cost of lumber = total linear feet (length in feet) * price per foot. A stud typically 92 ⅝" in length costs $5.17 approximately., What is the square footage of a 16 foot by 20 foot rectangle? How big is a 16 x 20 rectangle? 16 ft by 20 ft room in square feet. Use this easy and mobile-friendly calculator to compute the area of a rectangle given the length of its sides., Use special characters on Facebook to make statuses and comments more interesting for viewers. The square symbol doesn't have a specific meaning but it can be an add-on or used to ..., Summary. How many square feet for a 15 feet wide by 30 feet long area? Square footage is calculated by multiplying width by length. So if a area is 15 foot wide by 30 foot long, 15 x 30 = 450 square feet. Square footage calculators can be used for tiles, carpet flooring, paint, a room, house square footage or general area calculations., Summary. How many square feet for a 16 feet wide by 8 feet long room? Square footage is calculated by multiplying width by length. So if a room is 16 foot wide by 8 foot long, 16 x 8 = 128 square feet. Square footage calculators can be used for tiles, carpet flooring, paint, a room, house square footage or general area calculations., A 16 x 16 area is 256 sq feet. This could be used to calculate the square footage of any rectangular area such as a living room, bathroom, backyard, park, or floor area. ... How many square meters are in a 16 foot by 16 foot area? There are about 10.7639 ft2 in a m2. In an area of 16ft by 16ft, there are 23.78 square meters. Square Footage ..., A 20 x 20 area is 400 sq feet. This could be used to calculate the square footage of any rectangular area such as a living room, bathroom, backyard, park, or floor area. Square footage is also commonly used to estimate the cost of material needed for painting, flooring, and other types of construction., It is 144 square inches, 1/9 th of a square yard, or approximately 0.093 square meters. Common abbreviations: sq ft, sf, ft², ft^2 Square Miles to Square Feet Conversion Table, Summary. How many square feet for a 24 feet wide by 28 feet long area? Square footage is calculated by multiplying width by length. So if a area is 24 foot wide by 28 foot long, 24 x 28 = 672 square feet. Square footage calculators can be used for tiles, carpet flooring, paint, a room, house square footage or general area calculations., Window Air Conditioners / 5,000 to 24,000 BTUs: Best suited for up to 1,000 square feet, but if the floor plan is open, they can be used in spaces up to 1,400 square feet. The chart above is very accurate if you're considering a window AC. Portable Air Conditioners / 6,000 to 14,000 BTUs: Best suited for up to 400 square feet in most areas ..., How big is an area of 2ft by 64ft? A 2 x 64 area is 128 sq feet. This could be used to calculate the square footage of any rectangular area such as a living room, bathroom, backyard, park, or floor area. Square footage is also commonly used to estimate the cost of material needed for painting, flooring, and other types of construction. , How many square feet for a 8 feet wide by 15 feet long room? Square footage is calculated by multiplying width by length. So if a room is 8 foot wide by 15 foot long, 8 x 15 = 120 square feet. Square footage calculators can be used for tiles, carpet flooring, paint, a room, house square footage or general area calculations., DALLAS, July 22, 2021 /PRNewswire/ -- Dalfen Industrial announced the acquisition of a newly developed, 3-building, 711,855 square feet industrial... DALLAS, July 22, 2021 /PRNewsw..., Square meter. Definition: The square meter, or square metre (symbol: m 2), is an SI (International System of Units) derived unit of area.It is defined as the area of a square with side measures of one meter, where the meter is currently defined as the distance traveled by light in 1/299 792 458 of a second when expressed in the unit m·s-1, where the second is defined in terms of the cesium ..., Summary. How many square feet for a 12 feet wide by 32 feet long room? Square footage is calculated by multiplying width by length. So if a room is 12 foot wide by 32 foot long, 12 x 32 = 384 square feet. Square footage calculators can be used for tiles, carpet flooring, paint, a room, house square footage or general area calculations., How big is a 16 x 16 rectangle? 16 ft by 16 ft room in square feet. Use this easy and mobile-friendly calculator to compute the area of a rectangle given the length of its sides. ... square feet: 36,864: square inches: 28.444: square yards: 0.0058770: acres: 23.783: square meters: 237,830: square centimeters: 0.0023783: hectares:, 142.166596 ft2. 49 m3 =. 144.134339 ft2. 50 m3 =. 146.08874 ft2. ↗ Show Square feet → Cubic meter Conversion Chart Instead. » Volume Unit Conversions., The short leg of the room is 8 feet wide by 12 feet long. 14 x 20 = 280 square feet. 8 x 12 = 96. 280 + 96 = 376 square feet. How many square feet will a 10000 BTU AC cool? Using the AC Cooling Capacity Calculator or the AC Size to Room Size Table, you can see that a 10000 AC will cool up to 500 square feet. Will a 24,000 BTU AC cool a …, Max. Solar System Size (800 Sq Ft) = 800 Sq Ft × 0.75 × 17.25 Watts / Sq Ft = 10,350 Watt = 10.35kW Solar System. Now, by average solar panel wattage per square foot, we can put a 10.35kW solar system on an 800 sq ft roof. This is how many solar panels you can put on this roof: If you only use 100-watt solar panels, you can put 103 100-watt ..., How many square feet for a 30 feet wide by 10 feet long room? Square footage is calculated by multiplying width by length. So if a room is 30 foot wide by 10 foot long, 30 x 10 = 300 square feet. Square footage calculators can be used for tiles, carpet flooring, paint, a room, house square footage or general area calculations., Summary. How many square feet for a 13 feet wide by 7 feet long room? Square footage is calculated by multiplying width by length. So if a room is 13 foot wide by 7 foot long, 13 x 7 = 91 square feet. Square footage calculators can be used for tiles, carpet flooring, paint, a room, house square footage or general area calculations., Including the bathroom, which brings the total square footage to 53 square feet, the entire room is only about the size of Singapore's new 50-square-foot A380 first class suite. St..., How many square feet for a 16 feet wide by 21 feet long room? Square footage is calculated by multiplying width by length. So if a room is 16 foot wide by 21 foot long, 16 x 21 = 336 square feet. Square footage calculators can be used for tiles, carpet flooring, paint, a room, house square footage or general area calculations.