Calculateur de Pente de Toit Gratuit
Calculez la pente de votre toiture en degrés et en ratio. Entrez la montée et la course pour un résultat instantané.
Vertical rise per 12 inches of run
Typically 12 inches (standard pitch notation)
Pitch (X/12)
6.0
Pitch (X/12) vs Rise
Formule
## How to Calculate Roof Pitch ### Formula **Pitch = Rise / Run** (typically expressed as X:12) **Angle = arctan(Rise / Run)** in degrees **Pitch Factor = sqrt(1 + (Rise/Run)²)** Roof pitch is expressed as the number of inches of rise per 12 inches of horizontal run. For example, a 6/12 pitch rises 6 inches for every 12 inches of run. The pitch factor is used to convert footprint area to actual roof area.
Exemple Résolu
A roof with 6 inches of rise per 12 inches of run (6/12 pitch).
- 01Pitch = 6/12
- 02Angle = arctan(6/12) = arctan(0.5) = 26.6 degrees
- 03Pitch factor = sqrt(1 + 0.5²) = sqrt(1.25) = 1.1180
- 04Slope = 0.5 × 100 = 50%
Questions Fréquentes
What is the most common roof pitch?
The most common residential roof pitches are 4/12 to 9/12. A 4/12 pitch is the minimum for asphalt shingles. A 6/12 pitch is considered standard.
What is the pitch factor used for?
Multiply the building footprint area by the pitch factor to get the actual roof surface area. For example, a 1,000 sq ft footprint with a 6/12 pitch: 1,000 × 1.118 = 1,118 sq ft of roof.
What roof pitch is walkable?
Pitches of 6/12 and below are generally considered walkable. From 7/12 to 10/12, roof jacks and harnesses are recommended. Above 10/12 requires specialized equipment.
Apprendre