Cement, Sand & Aggregate Calculator
Separate modes for concrete, plaster, masonry mortar and screed — because one universal ratio would be wrong for all four. Wet volume is converted to dry material volume explicitly.
For information & planning only · not a quotation · get a quotation →
Your estimate
Indicative · not a quotation
Ready to calculate
Enter your measurements on the left and click Calculate Total Estimate Free to compute required quantities and your indicative estimate.
Assumptions & limits+
- Money figures use MAYA's illustrative planning rates — an indicative estimate, not a quotation. A site-verified BOQ follows a consultation.
- Dry volume factor: 1.54 for concrete and 1.33 for mortar to account for voids and shrinkage.
- 1 bag of cement (50 kg) = 0.0347 m³. Plaster volume includes +20% for surface undulation; masonry mortar is taken as 30% of brick wall volume.
- Preliminary planning quantities only — structural concrete must follow the approved design mix and reinforcement drawings.
Can I use this for structural concrete?+
For preliminary quantity only. Structural concrete follows the approved design mix and reinforcement drawings — nominal ratios are a starting point, not a design.
Why does plaster add 20%?+
Walls are never perfectly plane; filling undulations and joints consumes extra mortar.
How much wastage should I add?+
2–5% for cement and sand, more on sites with poor storage.