How many square metres does a 5-litre tin of paint cover?

A standard 5-litre tin of quality trade emulsion covers approximately 60 square metres for a single coat (based on a 12 m² per litre standard). For a recommended two-coat application on prepared walls, one 5L tin will cover roughly 30 square metres of wall area.

Why do you add a 10% waste buffer to paint calculations?

The 10% trade waste factor accounts for paint absorbed by dry rollers and brushes, paint left in trays and tin rims, edge cutting-in, and minor touch-ups. Without this buffer, DIY decorators frequently run out of paint before the final coat is complete.

How much paint is needed for an average Aberdeen bedroom?

An average 4m x 3.5m bedroom with standard 2.4m ceilings has approximately 32.5 m² of net wall area (accounting for standard door and window deductions). Two coats of wall emulsion require approximately 5.5 to 6 litres of paint, plus 2.5 litres if you are repainting the ceiling.

Why does trade paint cover more square metres than retail paint?

Trade paint (such as Dulux Trade or Johnstone's Trade) is formulated with significantly higher pigment and binder density and less water filler. This allows for 12 m² per litre coverage with opaque two-coat opacity, compared to retail DIY paints which often require 3 to 4 coats to achieve the same depth.

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Aberdeen Room Paint & Decorating Cost Calculator

Calculate exact square metres ($m^2$), paint litre requirements, and trade material costs for your Aberdeen property with our smart multi-room tool.

Interactive Room Estimator

Aberdeen Room Paint & Square Metre Calculator

Add your rooms below. All calculations automatically include a 10% trade waste factor and standard door/window deductions.

Room Length (Metres)

Room Width (Metres)

Ceiling Height (Metres)

Include Ceiling AreaInclude Primer / Undercoat

Paint Coats:

Room Gross Area (incl. 10% waste): 65.7 m²Est. Paint Volume: 10.9 Litres

Instant Calculation1 Room(s) Added

Total Coverage Area (incl. 10% waste buffer)65.7 m²

Estimated Paint Required (Standard 12m²/L)10.9 Litres

Includes 10% trade waste for cutting-in and roller absorption.

Calculated on trade-grade high binder density emulsions (Dulux/Johnstone's).

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Trade Knowledge

Understanding Paint Coverage & Trade Formulation Secrets

Why calculating exact paint volume is critical for Scottish granite properties and tenement restorations.

The 12 m²/L Trade Standard

Professional trade paints (Dulux Trade, Johnstone's Trade, Tikkurila) consistently yield 12 square metres per litre. Retail DIY tubs often deliver only 8-10 m²/L, requiring 3-4 coats and doubling your labor time.

The 10% Waste Factor

Our calculator automatically adds a 10% buffer. Roller sleeves absorb up to 300ml of paint before laying down a smooth film, and angled sash brushes retain paint during precision cutting-in.

Tenement Ceiling Heights

Victorian and Edwardian granite flats across Rosemount and the West End frequently feature 3.0m to 3.4m ceiling heights. Use our dropdown selector to ensure your wall area isn't underestimated.

DIY Painting vs. The AcePainter Fixed-Price Standard

Comparison Aspect	DIY Decorating Reality	The AcePainter Trade Service
Sanding & Surface Prep	Dust all over carpets and furniture	99.8% Dustless HEPA Machine Sanding
Paint Quality & Durability	Thin retail paint that scuffs easily	Trade Diamond Matt (Scrubbable & Anti-Mould)
Time & Weekend Commitment	2-3 lost weekends with mess	1-2 days flat turnaround with full clean up
Pricing & Risk	Overbuying paint & buying ladders/tools	100% Fixed Written Price Guarantee

Frequently Asked Questions About Paint Coverage

How many square metres does 5L of paint cover?

A standard 5L tin of trade emulsion covers ~60 m² for one coat. For a recommended 2-coat application, 5L covers approximately 30 square metres of wall area.

Do I need primer on bare plaster or dark walls?

Yes. Fresh plaster or stark color transitions require a breathable mist coat or stain-blocking primer (e.g. Zinsser Bulls Eye) to prevent peeling and uneven sheen.

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