Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Construction
Roofing Shingle Calculator
Calculates the number of roofing squares needed to cover a roof, including a user-defined waste allowance. Use this when ordering shingles for a new roof or a re-roofing project.
Fill in the required fields to see your result.
Construction
Concrete Volume Calculator
Estimate how many cubic metres of concrete to order for a rectangular slab, footing, or path. Multiply length × width × depth for the in-place volume — add a 5–10% waste allowance before placing the order.
Fill in the required fields to see your result.
Key differences
| Roofing Shingle Calculator | Concrete Volume Calculator | |
|---|---|---|
| Category | Construction | Construction |
| Inputs required | 2 | 3 |
| Result | Shingle Squares Needed (squares) | Concrete Volume Needed (m³) |
| What it does | Calculates the number of roofing squares needed to cover a roof, including a user-defined waste allowance. Use this when ordering shingles for a new roof or a re-roofing project. | Estimate how many cubic metres of concrete to order for a rectangular slab, footing, or path. Multiply length × width × depth for the in-place volume — add a 5–10% waste allowance before placing the order. |