Shed Roof Calculator

Calculate single-slope shed roof area from dimensions and pitch. Also called a skillion, lean-to, or pent roof โ€” the simplest roof structure.

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Shed Roof Dimensions

Enter building footprint and slope pitch

ft
ft
in

What Is a Shed Roof?

A shed roof is a single sloping surface, the simplest of all roof designs. One wall is taller than the opposite wall, creating the slope. Used for sheds, lean-tos, additions, porches, and contemporary architecture.

Shed Roof Area = Length ร— Slope Length
Slope Length = Width รท cos(pitch angle)
High Side Height = Width ร— tan(pitch angle)

Advantages

  • Simplest and cheapest to build โ€” minimal framing required
  • Excellent for solar panel installations (single south-facing slope)
  • Modern, clean aesthetic
  • Easy drainage โ€” water flows in one direction

๐Ÿ“Š Roof Area

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Enter dimensions to calculate shed roof area.