Roof Area Calculator

Roof Area Calculation Formulas

Roof pitch percentage:

$$\text{pitch(%)} = \frac{x}{12} \times 100\%$$

Roof pitch in degrees:

$$\text{pitch(deg)} = \arctan\left(\text{pitch(%)}\right)$$

Total area of the roof:

$$\text{roof area} = \frac{\text{base area}}{\cos\left(\text{pitch(deg)}\right)}$$