Square Feet Formula:
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Square feet calculation is a method to determine the area of a space by multiplying length and width measurements. When using feet and inches, the measurements are converted to a common unit (inches) before calculating the area.
The calculator uses the formula:
Where:
Explanation: The formula converts both measurements to total inches, calculates the area in square inches, then converts back to square feet by dividing by 144 (since 1 square foot = 144 square inches).
Details: Accurate square footage calculation is essential for construction projects, real estate transactions, flooring installation, painting estimates, and many other applications where area measurement is required.
Tips: Enter the length and width in feet and inches separately. For example, for a measurement of 5 feet 8 inches, enter 5 in the feet field and 8 in the inches field. Inches must be between 0-11.
Q1: Why convert to inches first?
A: Converting to inches ensures accurate calculation when dealing with mixed units (feet and inches) and prevents decimal errors.
Q2: What if I have measurements in decimals?
A: For decimal feet, you can enter the whole number part in feet and the decimal part converted to inches (multiply by 12).
Q3: How accurate is this calculation?
A: The calculation is mathematically precise when correct measurements are provided. The result is rounded to two decimal places for practical use.
Q4: Can I calculate square feet for irregular shapes?
A: This calculator is for rectangular areas only. Irregular shapes require more complex calculations or division into multiple rectangles.
Q5: Why divide by 144?
A: There are 144 square inches in one square foot (12 inches × 12 inches = 144 square inches).