Choose a rectangular prism or a cylinder. Use internal dimensions of the volume to be filled and add only the allowance justified for your project. The calculation excludes reinforcement displacement unless already deducted from the entered geometry. It estimates volume and cost, not mix design, structural adequacy or foundation suitability.
Worked reference example
Illustrative inputs in metres and SI units; the price is an example entered by the user, not a market quotation. Numeric reference verified by the automated test suite.
- Length
- 4
- Width
- 3
- Depth
- 0.1
- Diameter
- 1
- Allowance
- 10
- Price per purchase unit
- 2
- Result
- 1.32
- Cost (example currency units)
- 2.64
Calculation method
V = L × W × d; V = π × (D/2)² × dMeasure. Calculate. Build.
- Use actual dimensions and split complex rooms into rectangles.
- Allow for cuts, joints and package sizes. Compare stock formats.
- Combine your results in a shopping list you can save and print.
Sources & limits
Planning estimates; verify measurements and product data before purchasing.
Prices are supplied by you. Area estimates do not establish a feasible cutting arrangement. These tools do not assess structural loads or issue construction approvals.