How much paint do I need for a 35 m² wall area?

With a coverage of 8 m²/litre and 2 coats, you need about 8.8 litres. Adding 10% for waste and touch-ups brings it to ~9.7 litres — in practice, a 10-litre tub.

Why does paint consumption vary so much?

Coverage depends on the substrate (bare drywall absorbs more than already-painted walls), number of coats, colour change, paint type, and whether it is a ceiling or a wall. Rough or absorbent surfaces cover 6–8 m²/litre; smooth, already-painted walls reach 8–10 m²/litre.

Should I use a primer?

A primer is recommended on new absorbent surfaces such as bare drywall or fresh plaster. A solid-colour primer reduces paint usage and can save an extra coat of expensive top-coat paint.

How much waste should I budget for?

Plan for 5–10% extra for waste, touch-ups and retouching. For ceilings or irregular rooms, 10–15% may be more realistic.

How much paint do you need per m²?

Q: How much paint do you need per m²?

Wall paint typically covers 6–10 m² per litre per coat, or about 0.1–0.17 litres per m². For two coats, plan on roughly 0.2–0.35 litres per m² in total.

Wall paint typically covers 6–10 m² per litre per coat, depending on the surface, paint type and application method. That equals a consumption of roughly 0.1–0.17 litres per m² per coat. With two coats you should expect about 0.2–0.35 litres per m² in total.

Typical rules of thumb

Smooth, previously painted walls8–10 m²/litre

Rough or textured walls6–8 m²/litre

Ceiling (horizontal surface)7–9 m²/litre

Absorbent surface (new plaster, raw drywall)5–7 m²/litre

Colour change (light to dark or vice versa)Often 3 coats needed

These values are approximate and based on typical indoor acrylic paints. Always check the coverage on the paint can — it can vary considerably between products.

Example: Living room with 35 m² of wall area

Imagine a living room with a total wall area of 35 m². You're using a wall paint with a coverage of 8 m² per litre and applying 2 coats.

Wall area35 m²

Coverage8 m²/litre

Number of coats2

Usage per coat35 ÷ 8 = 4.4 litres

Total (2 coats)approx. 8.8 litres

With 10% wasteapprox. 9.7 litres

In practice you'd typically buy a 10-litre tin so you have a bit left over for touch-ups and repairs.

What affects paint coverage?

Number of coats

Most painting jobs require 2 coats for full coverage. Each additional coat uses the same amount of paint as the first. When changing from a dark colour to a light one, 3 coats may be necessary.

Surface and substrate

New, unpainted drywall absorbs more paint than an already painted surface. A primer coat can significantly reduce consumption on absorbent substrates. Rough textures like raw masonry or render also use more than a smooth surface.

Colour change

Switching from a dark colour to a light one (or vice versa) rarely achieves full coverage in 2 coats. A high-opacity primer in a neutral colour can save you an extra coat of expensive top paint.

Paint type

Acrylic, silicate, latex and lime paints all have different coverage rates. Always check the product specification — usually listed as m²/litre on the packaging.

Ceiling versus wall

Ceiling paint is applied horizontally, which typically causes more dripping and waste than wall painting. Expect about 5–10% more consumption when painting a ceiling compared to an equivalent wall area.

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