You can also calculate roof pitch even without using a roof slope calculator.
Square area of roof with 9 12 pitch.
Roof is 6 12 pitch and measures at 2 400 square feet so 2400 x 1 12 2 688 2 88 sqs added for pitch.
1square of roofing covers 100 square feet of roof a bundle is 1.
Pitch multiplier 0 12 1.
So keeping with our roof pitch of 4 this gives us 1 9.
A roof s pitch is determined by how much it rises vertically for every foot it runs horizontally.
Add 1 then take the square root.
For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches.
Roof pitch area multipliers.
Image 1 12 to 12 12 roof pitch 7 12 pitch.
However shingles are packaged in a way that they are light enough for the average person to carry around.
Get your roof size by using this roof pitch calculator.
These roofs have a pitch less than 4 12.
To accurately calculate the area of your roof you must first determine its slope or pitch.
For example a 4 12 pitch roof that is 100 square feet.
100 1 054 105 4ft 2.
Keep in mind that the average size of a roof is 1 700 square feet so your total will likely be 10 higher or lower than this figure.
Multipliers for common roof pitches that can be used to find the total area of a roof.
The first step in a free roofing estimate is measuring the roof dimensions.
Tips on measuring for roofing.
See the image below for more explanation on rise run and pitch.
If this isn t practical then perform the same measurement on the underside of the roof.
Adding 1 gives us 1 1 9 10 9 then taking the square root gives us about 1 0541.
A square of shingles is the number of shingles needed to cover 100 sq feet of roof area.
Outside of the u s a degree angle is typically used.
You will need to express this size in terms of square feet.
Roof pitch degree table.
They have a pitch ranging from 4 12 to 9 12.
Roof pitch is a determining factor for cost of the roof as well as the roof area and the type of materials used.
A 12 in 12 pitch is a steep 45 degree angle roof.
We included a roof pitch chart below the 7 12 example image and the calculator below that.
Thus a moderate 6 in 12 roof pitch means that the roof rises 6 inches vertically for every 12 horizontal inches it runs.
As a rule of thumb there are 3 bundles to a square assuming that you are using three tab strip shingles.
High pitched roofs often need extra fasteners and their pitch can be as high as 21 12.
