Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
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.
Construction
Gravel Tonnage Calculator
Calculates the tonnage of gravel required to cover a given area at a specified depth. Ideal for driveways, pathways, and landscaping projects where you need to order aggregate by weight.
Fill in the required fields to see your result.
Key differences
| Concrete Slab Bag Calculator | Gravel Tonnage Calculator | |
|---|---|---|
| Category | Construction | Construction |
| Inputs required | 5 | 3 |
| Result | Bags of Concrete Needed (bags) | Gravel Required (tonnes) |
| What it does | 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. | Calculates the tonnage of gravel required to cover a given area at a specified depth. Ideal for driveways, pathways, and landscaping projects where you need to order aggregate by weight. |