Roofgenius.com Roof calculator, calculates a detail list of roof materials, and a complete estimate. Two ways to determine roof pitch. Offers tips and how to's on roofing.
Roof Pitch, how much to add
This roof pitch table displays a multiplier for adding for different roof pitches. How to find your what roof pitch category.
If you know the pitch of a roof, you can use the numbers in the following pitch table to do the following:
Determine how many square feet of roof area a building has by measuring from the ground.
Determine how many square feet of roof area a building has by measuring blueprints or plans.
This Roof Pitch Chart will give you your multiplier.
Or just enter your numbers into this Roof Pitch Degrees.
| Roof Pitch | Roof Pitch Multiplier | Roof Pitch Degrees |
| 2/12 | 1.01 | 9.46° |
| 3/12 | 1.03 | 14.04° |
| 4/12 | 1.05 | 18.43° |
| 5/12 | 1.08 | 22.62° |
| 6/12 | 1.12 | 26.57° |
| 7/12 | 1.16 | 30.26° |
| 8/12 | 1.20 | 33.69° |
| 9/12 | 1.25 | 36.87° |
| 10/12 | 1.30 | 39.81° |
Example:
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.
Get your roof size by using this Roof Pitch Calculator.
| Roof Pitch | Roof Pitch Multiplier | Roof Pitch Degrees |
| 12/12 | 1.41 | 45° |
| 14/12 | 1.54 | 49.4° |
| 16/12 | 1.67 | 53.13° |
| 18/12 | 1.80 | 56.31° |
| 20/12 | 1.94 | 59.04° |
| 22/12 | 2.09 | 61.39° |
| 24/12 | 2.24 | 63.43° |
Enter your numbers into this go to Roof Pitch Calculator
