Roofing Calculators
Shed Roof Area Calculator
Calculate your single-slope roof area for sheds, carports, verandahs, and granny flats. Enter span, length, and pitch to get sloped area, rise height, and material estimates.
Enter Dimensions
Results update automatically as you change inputs.
Shed Roof Cross-Section
Footprint Area
0.00 m²
0.00 ft²
Sloped Roof Area
0.00 m²
0.00 ft²
Slope Length
0.00 m
0.00 ft
Rise Height
0.00 m
0.00 ft
Area with Waste (10%)
0.00 m²
0.00 ft²
Roofing Squares
0.00
1 square = 100 ft² (9.29 m²)
Pitch Multiplier
1.0541
Pitch Angle
18.43°
Area Increase
+5.41%
Calculation Breakdown
Pitch Multiplier Reference Table
Multiply your footprint span by the pitch multiplier to get the slope length. The sloped area equals slope length × total building length.
| Pitch Ratio | Angle (°) | Multiplier | Area Increase |
|---|
Gable Roof Calculator
Calculate two-slope gable roof area from building dimensions and pitch. Great for standard houses and garages.
Calculate Gable Roof →Roof Area Calculator
General roof area calculator for any roof type. Enter footprint dimensions and pitch to get sloped area.
Calculate Roof Area →All Roofing Calculators
Browse our full suite of free roofing calculators for every roof type and measurement need.
View All Calculators →Frequently Asked Questions
Common questions about shed and single-slope roofing
What is a shed (skillion) roof?
A shed roof, also called a skillion or mono-pitch roof, is a single flat surface sloping in one direction. It has one high wall and one low wall. It’s the simplest roof form and is commonly used on sheds, carports, verandahs, lean-to additions, and modern architectural homes.
What is the minimum pitch for shed roofing?
In Australia, the minimum recommended pitch for metal roofing on sheds is typically 2° to 5° depending on the roofing profile and sheet length. Corrugated iron generally requires at least 5°, while standing-seam profiles can go as low as 1–2°. Always check manufacturer specifications and local council requirements.
Why are shed roofs popular for ADUs and granny flats?
Shed roofs are popular for accessory dwelling units (ADUs) and granny flats because they’re cost-effective, easy to build, and offer a clean modern aesthetic. The single slope simplifies drainage, allows for higher ceilings on one side (great for loft areas), and makes solar panel installation straightforward.
Which direction should a shed roof drain?
The roof should slope away from the main building if it’s a lean-to, or towards the gutter and downpipe system. In Australia, consider sloping the low side away from prevailing weather and towards areas where stormwater can drain safely. Always comply with local stormwater regulations.
Can shed roofs have solar panels?
Yes, shed roofs are excellent for solar panels. The single flat plane provides a large, uninterrupted area for panel installation. If the roof faces north (in the Southern Hemisphere), it’s ideal for solar generation. Even east- or west-facing shed roofs produce good solar output across the day.
Planning a Shed or Carport Roof?
From garden sheds to carports and granny flats, we handle all single-slope roofing across the Barossa Valley.