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Use this calculator to find the square footage, square yardage or square meters for a building, home, garden or construction project. Calculate square footage, yardage or meters for landscape, flooring, carpet, or tiling projects to estimate area and the amount of material you will need. Also calculate the cost of materials when you enter the price per square foot, price per square yard or price per square meter.
If you want to calculate volume of bulk materials such as mulch or gravel you should use our calculator for cubic yards and cubic meters.
Enter measurements in US units or metric units. Calculate area from your measurements in inches (in), feet (ft), yards (yd), millimeters (mm), centimeters (cm), or meters (m). You can also enter decimal values. For example, if you have one measurement that is 7'3" you can enter that as 7.25 feet. If you have a measurement of 245 cm you can also enter that as 2.45 m.
Square footage is area expressed in square feet. Likewise, square yardage is area expressed in square yards. Square meters is also a common measure of area.
Assume you have a rectangular area such as a room and, for example, you want to calculate the square footage area for flooring or carpet.
The way to calculate a rectangular area is by measuring the length and width of your area then multiplying those two numbers together to get the area in feet squared (ft^{2}). If you have on odd shaped area, such as an Lshape, split it into square or rectanglualar sections and treat them as two separate areas. Calculate the area of each section then add them together for your total. If your measurements are in different units, say feet and inches, you can first convert those values to feet, then multiply them together to get the square footage of the area.
You could, for example, perform all of your measurements in inches or centimeters, calculate area in square inches or square centimeters then convert your final answer to the unit you need such as square feet or square meters.
To convert among square feet, yards and meters use the following conversion factors. For other units use our calculator for area conversions.
Square  Using measurements in feet: Area (ft^{2}) = 2 x Side Length 


Rectangle  Using measurements in feet: Area (ft^{2}) = Length x Width 

Rectangle Border 
Using measurements in feet: Inner Area (ft^{2}) = Length x Width Total Area (ft^{2}) = (Length + (2 x Border Width)) x (Width + (2 x Border Width)) Area (ft^{2}) = Total Area  Inner Area 

Circle  Using measurements in feet: Area (ft^{2}) = Pi x (Diameter/2)^2 Pi = 3.14 

Circle Border 
Using measurements in feet: Outer Diameter = Inner Diameter + (2 x Border Width) Outer Area (ft^{2}) = Pi x (Outer Diameter/2)^2 Inner Area (ft^{2}) = Pi x (Inner Diameter/2)^2 Area (ft^{2}) = Outer Area  Inner Area Pi = 3.14 Obviously, the Circle Border and Annulus are the same, just measured differently. 

Annulus  Using measurements in feet: Outer Area (ft^{2}) = Pi x (Outer Diameter/2)^2 Inner Area (ft^{2}) = Pi x (Inner Diameter/2)^2 Area (ft^{2}) = Outer Area  Inner Area Pi = 3.14 Obviously, the Circle Border and Annulus are the same, just measured differently. 

Triangle  Using measurements in feet: Area (ft^{2}) = (1/4) x square root[ (a+b+c) x (b+ca) x (c+ab) x (a+bc) ] 
Cite this content, page or calculator as:
Furey, Edward "Square Footage Calculator" From http://www.CalculatorSoup.com  Online Calculator Resource.