Paint consumption depends on wall and ceiling surface area divided by theoretical spreading rate (typically 12 to 14 m² per litre per coat for quality water-based emulsion). Subtract door/window openings, and calculate 2 full coats over a properly sealed and primed substrate.
A practical mathematical guide to calculating paint quantities in Kenya. Covers wall surface area formulas, door and window deductions, plaster porosity factors, bucket pack combinations (1L, 4L, 20L), and waste margins.
Buying paint by guesswork leads to half-empty 20L drums sitting in garages or running out mid-wall with mismatched tint batches. Here is the mathematical formula for paint estimation.
The definitive master architectural checklist: a structured journey across substrate diagnosis, moisture limits, paint calculation, colour sampling, and trade sequencing.