Roof Pitch Calculator Australia

Quick and precise roof pitch measurement is easy. Simply place your phone flat on the roof.

How to Use Our Roof Pitch Calculator

Our roof pitch calculator is user-friendly and lets you measure your roof’s pitch in seconds using just your phone. No special tools are required.

Step 1: Position your phone flat against the slope of the roof.

Lay your phone flat against the roof surface to measure the pitch.

Step 2: Tap “Measure Pitch Now”

Tap the big Blue box above to activate the live measurement.

Step 3: Allow Motion Access.

Allow your browser to access motion sensors when prompted (required on iPhone and Android)

Understanding Your Results

You’ll see the exact roof angle in degrees, plus common pitch formats used in Australia.

Common Gazebo Roof Pitches in Australia

Pitch (Degrees)	Rise/Run	Best For
15°	3.2/12	Low profile, modern gazebos
20°	4.4/12	Most popular gazebo pitch
25°	5.7/12	Excellent water runoff
30°	7/12	Steep, traditional look

What Is Roof Pitch and Why Does It Matter?

Roof pitch refers to the steepness of a roof, typically measured in degrees or as a ratio. Getting the correct pitch is crucial when planning roofing projects for gazebos and pergolas.

Roof Pitch vs Roof Angle

Roof pitch and roof angle are closely related; our calculator displays both for better clarity.

The Importance of the Right Roof Pitch in Australia

Proper pitch ensures effective water runoff during heavy rain, prevents leaks, and maximizes the performance of asphalt shingles.

Common Roof Pitches for Gazebos and Pergolas in Australia

22.5° Roof Pitch

The most popular option for gazebos and pergolas in Australia.

25° Roof Pitch

Excellent water runoff while maintaining a classic appearance.

30° Roof Pitch

The traditional steep gable roof style creates a strong visual impact.

35° Roof Pitch

A very common roof angle for thatched Bali huts, allowing water to run off the surface properly.

45° Roof Pitch

Steeples are common in classic churches and some American-style homes, typically featuring steeply pitched gable sections.

Optimal Roof Pitch for Gable Roofs

The ideal pitch depends on your design, location, and rainfall. Most Australian homeowners choose between 20° and 25° for the gable roof pitch of gazebos.

Understanding the Importance of Accurate Roof Pitch for Your Project

Using the incorrect pitch can result in poor shingle performance, water pooling, and increased long-term costs. A steeper roof angle ensures that roofing materials last longer. This is particularly important for thatched Bali huts and Western Red Cedar roofs. Our calculator helps you choose the right pitch the first time.

Asphalt Shingles and Calculating Roof Pitch

Asphalt shingle roofing systems are suitable for a wide range of roof angles. To determine if your re-roofing or roof replacement project can use an asphalt shingle system, please utilize our roof pitch calculator. If the calculator indicates a roof pitch of over 9.5°, then asphalt shingles can be installed.

• A roof slope between 9.5° and 18.5° is classified as low. For these roof angles, a double layer of synthetic roof underlay is required.
• A roof pitch of 18.5° to 60° is a standard slope, allowing for normal shingle and underlay application.
• A roof angle between 60° and 90° requires a steep-slope application. Shingles must be manually glued to the front edge of the shingle tab. Each shingle requires a glue dab the size of a 10-cent piece on each tab corner.

Requirements for Roof Pitch Using Slates, Terracotta Tiles, and Concrete Tiles

Most tiles require a minimum roof pitch of 15°. When the pitch is between 15° and 20°, sarking must be installed under the tiles to help with water runoff. Refer to the NCC (National Construction Code of Australia) for full details.

Frequently Asked Questions