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Roof Area Calculator

Calculate total sloped roof area from footprint dimensions and roof pitch. Outputs square feet and squares.

Roof Area Calculator

Calculate total sloped roof area from footprint and pitch.

Horizontal projected area, not sloped area

Roof Area2,236sq ft
Squares22.36squares

Pitch Factor Reference

Pitch factor = slope multiplier (multiply footprint area by this value to get sloped area). Source: NRCA Roofing Manual.

PitchAngleFactor
1:124.8°1.003
2:129.5°1.014
3:1214.0°1.031
4:1218.4°1.054
5:1222.6°1.083
6:1226.6°1.118
7:1230.3°1.158
8:1233.7°1.202
9:1236.9°1.250
10:1239.8°1.302
11:1242.5°1.357
12:1245.0°1.414

For reference only. Verify with your local building code and a licensed professional before making decisions.

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