Painting & Surface Finish Master Tool

Expert Guide

Estimate paint and primer coverage for interior and exterior walls and furniture.

Painter rolling bright paint on wall at construction site

⚡ Quick Answer

To estimate paint, calculate total wall area (Length × Height × 2 + Width × Height × 2), deduct 15% for doors/windows, and divide by the coverage (typically 60-70 sq.ft/litre for 2 coats of emulsion).

🛠️ How It Works

Master hub for painting and decorative finish tools using standard thumb-rules for quick estimation.

Choose the type of painting service: Internal, External, or Specialized finishes.
Measure the wall or surface area in m² or feet.
Deduct areas for openings like doors, windows, and cupboards.
Multiply by the number of coats (standard is 2 coats).
The master tool aggregates all specialized painting calculators for precise estimation.

📐 Calculation Formula

Total Area (sq.ft) = Area (m²) × 10.76

Net Paintable Area = Total Area × 0.85 (deducting 15% for openings)

Paint (Litres) = (Net Area / 120) × Coats

Putty (kg) = (Net Area / 15) × (Coats / 2)

📋 Real-Life Example

For 100 m² wall area and 2 coats:
1. Total Area = 1076 sq.ft
2. Net Area = 1076 × 0.85 = 915 sq.ft
3. Paint = (915 / 120) × 2 ≈ 15.2 Litres
4. Putty = (915 / 15) × (2 / 2) ≈ 61 kg

⚠️ Common Mistakes to Avoid

Not deducting door/window areas, leading to over-ordering paint.
Assuming the same coverage for interior and exterior surfaces.
Skipping the primer coat which reduces paint adhesion and finish quality.

❓ Frequently Asked Questions

What is the best time for painting in Nepal?

The best time is during the dry seasons (March-May and October-November). Avoid peak monsoon as high humidity prevents proper drying and leads to bubbles.

How much paint is needed for a standard 12x12 room?

For a 12x12x10ft room (approx 480 sq.ft wall area), you typically need 7-8 litres of emulsion paint for 2 coats.

Should I use washable paint?

Yes, premium emulsions are washable and stain-resistant, making them ideal for living rooms and kitchens where traffic is high.