Calculadora de Área do Telhado — Formula
## How to Calculate Roof Area
### Formula
**Roof Area = Footprint Area × Pitch Factor**
**Pitch Factor = sqrt(1 + (Rise/12)²)**
| Pitch | Factor |
|-------|--------|
| 4/12 | 1.0541 |
| 5/12 | 1.0833 |
| 6/12 | 1.1180 |
| 8/12 | 1.2019 |
| 10/12 | 1.3017 |
| 12/12 | 1.4142 |
This method converts the horizontal footprint into the actual surface area by accounting for the roof slope.
### Formula
**Roof Area = Footprint Area × Pitch Factor**
**Pitch Factor = sqrt(1 + (Rise/12)²)**
| Pitch | Factor |
|-------|--------|
| 4/12 | 1.0541 |
| 5/12 | 1.0833 |
| 6/12 | 1.1180 |
| 8/12 | 1.2019 |
| 10/12 | 1.3017 |
| 12/12 | 1.4142 |
This method converts the horizontal footprint into the actual surface area by accounting for the roof slope.
Exemplo Resolvido
A building 50 ft by 30 ft with a 6/12 roof pitch.
- Footprint area = 50 × 30 = 1,500 sq ft
- Pitch factor = sqrt(1 + (6/12)²) = sqrt(1.25) = 1.1180
- Roof area = 1,500 × 1.1180 = 1,677 sq ft
- Roofing squares = 1,677 / 100 = 16.8 squares