Square Footage Formula:
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Square footage is a measurement of area expressed in square feet (ft²). It represents the two-dimensional space within a set of boundaries and is commonly used in construction, real estate, and interior design to quantify the size of spaces.
The calculator uses the square footage formula:
Where:
Explanation: The calculator first converts any inches input to their decimal foot equivalent (inches ÷ 12), then multiplies length by width to calculate the total square footage.
Details: Accurate square footage calculation is essential for determining material quantities for flooring, painting, or tiling projects, calculating property values, planning space utilization, and complying with building codes.
Tips: Enter length and width measurements in feet and inches. The calculator automatically converts inches to decimal feet. All values must be non-negative numbers.
Q1: How do I measure irregularly shaped areas?
A: For irregular shapes, divide the area into regular rectangles, calculate each separately, then sum the results.
Q2: Does square footage include wall thickness?
A: Typically, interior measurements exclude wall thickness. Exterior measurements include walls. Always clarify which standard is being used.
Q3: How accurate should my measurements be?
A: For most projects, measuring to the nearest inch is sufficient. For precise material ordering, measure to the nearest 1/4 inch.
Q4: How do I convert square feet to other units?
A: 1 square foot = 144 square inches, 0.092903 square meters, or 0.0000229568 acres.
Q5: Should I add extra for waste when ordering materials?
A: Yes, it's recommended to add 5-10% extra material to account for cutting waste, pattern matching, or future repairs.