Roof Pitch Calculator
Work out your roof pitch. Enter the rise (vertical) and run (horizontal) and the calculator returns the pitch in degrees, the ratio, and what that pitch suits.
How we estimate this
Roof pitch is how steep the roof is, calculated from the rise (vertical) over the run (horizontal). It is expressed in degrees or as a ratio. Measure the rise over a known horizontal run (often 300mm or 1,000mm) to work it out.
Pricing reviewed: October 2026.
Doing more than just roof pitch?
Build a combined estimate across every part of your project in one place.
Pricing reviewed October 2026. Indicative Australian costs, not a quote.
Understanding roof pitchs in Australia
Roof pitch is how steep the roof is, calculated from the rise (vertical) over the run (horizontal). It is expressed in degrees or as a ratio. Measure the rise over a known horizontal run (often 300mm or 1,000mm) to work it out.
Pitch determines what roofing materials suit, tiles generally need a minimum pitch, very low pitches need metal with sealed laps, and steep roofs need safety access and cost more to work on.
Frequently asked questions
How do I calculate roof pitch?
Measure the rise (vertical) over a known run (horizontal), then the pitch in degrees is the inverse tangent of rise divided by run. Enter both for the answer in degrees and ratio.
What is a standard roof pitch in Australia?
Most Australian tiled roofs sit around 15 to 30 degrees. Metal roofs can go much lower (with sealed laps), and some designs are steeper for appearance.
Are you a roofing contractor?
Everyone on this page is working out what roof pitch costs because they are ready to hire. Put your business right beneath the calculator, in your state, so you are who they find. From $50/mo.