Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Construction
Roof Area Calculator
Calculate the true sloped surface area of a roof from its footprint dimensions and pitch angle. The slope multiplier (1/cos(pitch)) corrects for the fact that a pitched roof has more material area than the horizontal footprint it covers.
Fill in the required fields to see your result.
Construction
Paint Coverage Calculator
Calculate how many litres of paint you need for a job, given the area to cover, the number of coats, and the spread rate of your specific paint. Lets you order the right amount without overspending on excess or running short mid-coat.
Fill in the required fields to see your result.
Key differences
| Roof Area Calculator | Paint Coverage Calculator | |
|---|---|---|
| Category | Construction | Construction |
| Inputs required | 3 | 3 |
| Result | Roof Surface Area (m²) | Paint Required (liters) |
| What it does | Calculate the true sloped surface area of a roof from its footprint dimensions and pitch angle. The slope multiplier (1/cos(pitch)) corrects for the fact that a pitched roof has more material area than the horizontal footprint it covers. | Calculate how many litres of paint you need for a job, given the area to cover, the number of coats, and the spread rate of your specific paint. Lets you order the right amount without overspending on excess or running short mid-coat. |