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Shingle Coverage Calculator

Formula

To calculate the number of shingles needed:

$SC = \frac{A}{S} \times O$

Where:

$SC$ is the shingle coverage (number of shingles)
$A$ is the area to be covered (square feet)
$S$ is the coverage per shingle (square feet)
$O$ is the overage factor (percentage as a decimal)

What is Shingle Coverage?

Shingle coverage refers to the area that a certain quantity of roofing shingles can cover when installed on a roof. It is typically measured in squares, where one square equals 100 square feet. This measurement is crucial in determining the amount of shingles needed for a roofing project, ensuring that there are enough materials to cover the entire roof surface.

Example Calculation 1

Let's assume the following values:

Area to be Covered ( $A$ ) = 2000 square feet
Coverage per Shingle ( $S$ ) = 33 square feet
Overage Factor ( $O$ ) = 10% (0.10)

Use the formula:

$SC = \frac{2000}{33} \times (1 + 0.10) \approx 60.61 \times 1.10 \approx 66.67 \text{ shingles}$

The number of shingles needed is approximately 66.67.

Example Calculation 2

Let's assume the following values:

Area to be Covered ( $A$ ) = 1500 square feet
Coverage per Shingle ( $S$ ) = 25 square feet
Overage Factor ( $O$ ) = 15% (0.15)

Use the formula:

$SC = \frac{1500}{25} \times (1 + 0.15) \approx 60 \times 1.15 \approx 69.00 \text{ shingles}$

The number of shingles needed is approximately 69.00.