Expert Guide

Plastering Work
Internal Painting Calculator – Emulsion & Distemper
Quality Inspector

Find paint quantities for interior rooms.
📐 Formula & Method
Paintable Area = 2 × (L+W) × H - 15% (for doors/windows). Quantity = (Area in sq.ft / Coverage) × Coats.
Litres = (Area / Coverage) × Coats
📋 Worked Example
4m × 3m × 3m room (2 coats, 120sq.ft coverage): • Wall Area = 42 m² (452 sq.ft) • Litres ≈ 7.5 litres
❓ Frequently Asked Questions
It is typically 120-140 sq.ft per litre for one coat and 60-70 sq.ft per litre for two coats.
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