How to use this tool
Enter the coverage area in square meters and depth in centimeters.
Add allowance, bag volume and price. Check both bulk volume and rounded bag count.
Volume (litres) = area(m²) × depth(cm) × 10
Worked example
0.55 m³ · volume including allowance
Fixed example using the settings below. Monetary examples use USD; dates and times use their stated reference values. This example stays unchanged when you edit your calculation.
Example inputs
- Area (m²): 10
- Depth (cm): 5
- Waste allowance (%): 10
- Bag volume (litres): 50
- Price per bag: 5
Method illustration: 10 m² at 5 cm depth needs 500 L before allowance.
Assumptions and limits
- Estimates material quantities only, not structural adequacy or code compliance. Verify measurements and manufacturer coverage/yield.
- Waste is added before rounding to whole packages. Material costs exclude delivery, labor and tax unless included in entered prices.
Check or report a result
Check the units, selected calculation and assumptions first. Compare the fixed example above with your inputs to identify what changed.
Report a calculation issue with the page address, hypothetical inputs, result displayed and result expected. Do not include passwords, bank details or other private information.