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.
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.
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. |