Plaster Mortar Calculator
Plaster mortar quantity from wall area and thickness: wet volume = area × thickness, dry volume factor 1.33, then cement and sand are apportioned by the mix ratio.
Disclaimer：Results are produced by deterministic formulas and are intended for quantity estimating and option comparison only. A qualified engineer must verify them against the project specification, design documents and actual site conditions before use. The author accepts no liability for any loss arising from their use.
ASSUMPTIONS
RESULT
CALCULATION
METHOD
Wet volume
V = A × t; dry volume Vdry = V × 1.33 × (1 + waste%); cement and sand are then apportioned by the mix ratio.- A dry volume factor of 1.33 is the common empirical value for plastering mortar (1.54 is used for concrete).
- Cement density is taken as 1440 kg/m³; sand quantity is measured as loose volume.
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