免费屋顶坡度计算器
计算屋顶坡度（角度）、升降比和坡度系数，用于精确的屋顶测量。
Vertical rise per 12 inches of run
Typically 12 inches (standard pitch notation)
Pitch (X/12)
6.0
Pitch (X/12) vs Rise
公式
## 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.
计算示例
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%
常见问题
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.
学习