Concrete Bag calculator.
Turn a concrete volume into whole bags using the yield printed on your chosen product.
Your inputs
Use measurements from your plan and properties from your chosen product. Any prefilled values are illustrative.
A clear estimate starts here.
Enter your dimensions and product details to see the quantity and purchase breakdown.
Formula and assumptions
How this calculation works.
Bag weight does not determine mixed yield. Enter your product’s stated yield. Do not reapply waste to an already adjusted volume.
A worked example
Illustrative inputs only. Product properties and design dimensions are not recommendations for your project.
- Concrete volume before waste
- 1 m³
- Yield per bag
- 25 L/bag
- Waste allowance
- 10 %
Bags to purchase: 44 bags
Before you purchase
Use dimensions from your plan and properties from your chosen product. Any design spacing, section or fixing pattern must already be specified.
Method: dimensional arithmetic and user-supplied specifications. Software checks: 2026-10-03. Calculation and review policy.