Hugis
Pitch
Overhangs
Roof Area Calculator (Pitch-aware)
Calculate sloped area from plan dimensions and pitch. Split complex roofs into sections and sum them.
Inputs are horizontal (plan) lengths, not rafter length.
Mga Asumsyon
- Dimensions are plan (horizontal) lengths, not rafter lengths.
- Overhangs are treated as horizontal projections.
- Hip, gable/hip mixes, valleys, dormers, etc. should be handled by sectioning.
Unit
Unit is fixed on the right of each input.
Roof section
Drag to reorder
Formulas
- r = Rise/Run
- θ = atan(r)
- k = 1 / cos(θ) = sqrt(1 + r^2)
- Shed: Ap = (L + 2g) × (D + e + e2)
- Gable: Ap = (L + 2g) × (S + 2e)
- Sloped area: As = Ap × k
Mga Tala
- Ang tool na ito ay pantulong sa pag-compute at hindi kapalit ng design, regulasyon, kontrata, o safety requirements.
- Ang mga preset value ay halimbawa lamang at nag-iiba depende sa kondisyon.
よくある質問
What if the gable left/right spans differ?
Use the advanced option to enter left and right half spans.
How do I enter sun pitch?
You can enter 3.5 or 3 sun 5 bu.
Are inputs rafter lengths?
No. Inputs are plan (horizontal) lengths.