Mix consumption per m² — calculator
Estimate dry mix quantity from area and kg/m² rate. Avoid under-ordering on the last square metres.
- Find the manufacturer consumption rate (kg/m²) on the TDS for your layer thickness.
- Measure net area in m² — subtract fixed obstacles or add edge allowances as your spec requires.
- Multiply area × kg/m², then add 5–10% waste for spillage, uneven substrate, and cut-offs.
- Divide by bag weight (typically 25 kg) and round up — never round down on the last room.