Paint & Surface Coating Calculator
Calculate wall surface areas, door/window deductions, litres required, and estimated material costs.
1 Define Project Dimensions
Calculated Gross Surface Area:
45.00 m²
2 Openings & Deductions
Doors Specification
Total: 1.80 m²
Windows Specification
Total: 2.16 m²
3 Paint Efficiency & Options
m² / L
€
Click to change dynamic wall preview color
Painting Layout Preview 3D Interior Room Cutout
Estimated Materials Required
Calculated based on net paintable area & loss factors.
Total Gross Surface Area:
45.00 m²
Total Doors & Windows Deductions:
3.96 m²
Net Paintable Wall Area:
41.04 m²
Paint Required (Incl. Coats & Buffer):
5.64 Litres
Estimated 5L Paint Cans:
2 Can(s)
Primer / Undercoat Recommended:
2.82 Litres
Masking Tape Rolls (50m):
1 Roll(s)
Total Estimated Cost:
€56.43
Standard Material Yield & Application Specs:
- Interior Wall Coverage: Covers roughly 14–16 m² per Litre on smooth sealed walls, dropping to 8–10 m² on textured masonry/pebbledash.
- Undercoat / Primer: Recommended on bare plaster, drywall repairs, or severe color changes at approx 14 m² per Litre.
- Deduction Standard: Automatically subtracts full door and window dimensions from the gross perimeter surface wall area.
