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.
Civil
Concrete Volume Calculator
Estimate the in-place concrete volume for slabs, footings, walls, and other rectangular structural elements using V = L × W × T. The geometric volume in cubic metres — add 5–10% waste before placing the order.
Fill in the required fields to see your result.
Key differences
| Roof Area Calculator | Concrete Volume Calculator | |
|---|---|---|
| Category | Construction | Civil |
| Inputs required | 3 | 3 |
| Result | Roof Surface Area (m²) | Concrete Volume Required (m³) |
| 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. | Estimate the in-place concrete volume for slabs, footings, walls, and other rectangular structural elements using V = L × W × T. The geometric volume in cubic metres — add 5–10% waste before placing the order. |