Spike's Calculators

# Gable Roof Asphalt Shingles

Our Gable Roof Asphalt Shingles Calculator is designed to help you accurately estimate the number of asphalt shingles needed for your gable roof project. This tool assesses the dimensions of your building, the overhangs, roof pitch, and coverage area of each pack of shingles, as well as a waste factor, to ensure you have enough materials to complete the job.

#### Note:

One pack of standard shingles = covers 33 sq. ft. a pack.
However, with all the different types available, not all packs are equal in the number of pieces they contain, the length of the individual shingle, and the square foot coverage per pack. Not all types of shingles are useable for the starter strip or ridge. You could use ridge caps to cover the top ridge instead of cutting your own. As such, the calculator requires the square feet one pack covers.
`The result for starter strips and ridge capping is in a lineal feet amount needed for those two items and not included in the "Total Packs of Shingles Needed`

### Gable Roof Calculator

Building Length ft inch
Building Width ft inch
Eave Overhang inch
Gable Overhang inch
Roof Pitch /12
Coverage of One Pack ft²
Waste %

#### Results:

 Roof Area ft² Roof Angle in Decimal Degrees ° Roof Slope % Ridge Length lineal ft Shingle Starter Strip lineal ft Shingles Needed to Cover Roof packs Waste Factor Adds: packs Total Shingles Needed packs

#### Calculator

1. enter the length of your building in feet and inches
2. the width of your building in feet and inches
3. the eave overhang in inches
4. the gable overhang in inches
5. enter the roof pitch as a ratio (e.g., 6 for a 6/12 pitch)
6. the coverage area of one pack of shingles in square feet
7. the waste factor percentage to account for cutting and fitting losses

#### Results

1. the total surface area of the roof that needs to be covered with shingles
2. the angle of the roof's slope measured in degrees
3. the incline of the roof represented as a percentage
4. the length of the ridge line where the two sloping sides of the roof meet
5. the length of the starter strip needed for the eaves and gable ends of the roof
6. the total number of shingle packs required to cover the roof area, excluding waste
7. the additional number of shingle packs needed to account for cutting and fitting losses
8. the total packs of shingles needed to cover the roof, including the waste amount (the result for starter strips and ridge capping is in a lineal feet amount required for those two items and not included in the "Total Packs of Shingles Needed")

This calculator is valuable for homeowners, contractors, and DIY enthusiasts planning a roofing project. It provides accurate material estimates that can save time and money.