Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Construction
Roof Shingle Estimator (with Pitch)
Estimate the shingle bundles needed for a roof using the building footprint and the roof pitch. Enter the footprint length and width, choose the pitch to set the slope multiplier, add a waste allowance, and pick the shingle type to get the bundle count.
Fill in the required fields to see your result.
Construction
Concrete Slab Bag Calculator
Find out how many bags of pre-mixed concrete you need to pour a slab. Enter the slab length, width, and thickness, pick your bag size, and add a waste allowance to get the exact bag count for footings, patios, shed bases, and walkways.
Fill in the required fields to see your result.
Key differences
| Roof Shingle Estimator (with Pitch) | Concrete Slab Bag Calculator | |
|---|---|---|
| Category | Construction | Construction |
| Inputs required | 5 | 5 |
| Result | Shingle Bundles Needed (bundles) | Bags of Concrete Needed (bags) |
| What it does | Estimate the shingle bundles needed for a roof using the building footprint and the roof pitch. Enter the footprint length and width, choose the pitch to set the slope multiplier, add a waste allowance, and pick the shingle type to get the bundle count. | Find out how many bags of pre-mixed concrete you need to pour a slab. Enter the slab length, width, and thickness, pick your bag size, and add a waste allowance to get the exact bag count for footings, patios, shed bases, and walkways. |