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the paint calculator, you can calculate the paint quantity you need for your room. The paint calculator calculates the paint quantity you need for your room. The paint calculator calculates the paint quantity you need for your room. The paint calculator calculates the paint quantity you need for your room. The paint calculator calculates the paint quantity you need for your room. The paint calculator calculates the paint quantity you need for your room. The paint calculator calculates the paint quantity you need for your room. The paint calculator calculates the paint quantity you need for your room.Worked example:a5 × 4 m room with 2.5 m walls hasawall area of 2 × (5 + 4) × 2.5 = 90 m². Subtract one door (about 1.8 m²) and one window (1.5 m²) for 86.7 m² net; two coats over 10 m²/L with 10% waste is 86.7 × 2 ÷ 10 × 1.10 ≈ 19.1 litres.The paint calculator calculates the paint quantity you need for your room. The paint calculator calculates the paint quantity you need for your room.Worked example:a5 × 4 m room with 2.5 m walls hasawall area of 2 × (5 + 4) × 2.5 = 90 m². Subtract one door (about 1.8 m²) and one window (1.5 m²) for 86.7 m² net; two coats over 10 m²/L.Worked example:a5 × 4 m room with 2.5 m walls.Worked example:a5 × 4 m room with 2.5 m walls hasawall area of 2 × (5 + 4) × 2.5 = 90 m².Worked example:a5 × 4 m room with 2.5 m walls hasawall area of 2 × (5 + 4) × 2.5 = 90 m².Worked example:a5 × 4 m room with 2.5 m wall