How Much Does a 5 Litre Tin of Paint Cover?
You've got the tin. The question is whether it's enough. Here's exactly how far a 5 litre tin goes, broken down by paint type, room size, and number of coats.
A 5 litre tin is the default purchase for most room repaints. Whether it's enough depends on the paint type, the surface condition, and how many coats you're applying. This guide gives you the exact numbers so you can buy correctly the first time.
The straight answer: how far does a 5L tin go?
For standard matt emulsion at a coverage rate of 10–12 m² per litre:
| Tin size | One coat | Two coats |
|---|---|---|
| 1L | 10–12 m² | 5–6 m² |
| 2.5L | 25–30 m² | 12–15 m² |
| 5L | 50–60 m² | 25–30 m² |
| 10L | 100–120 m² | 50–60 m² |
These figures assume a smooth, previously painted surface in good condition. Bare plaster or heavily textured walls absorb considerably more paint and will reduce coverage by 20–30%.
Coverage by paint type
The 50–60 m² figure applies to standard matt emulsion. Other finishes behave differently because their pigment concentration, viscosity, and application properties vary.
| Paint type | Coverage rate (per litre) | 5L covers (one coat) |
|---|---|---|
| Matt emulsion | 10–12 m²/L | 50–60 m² |
| Silk emulsion | 9–11 m²/L | 45–55 m² |
| Gloss | 9–11 m²/L | 45–55 m² |
| Satin/eggshell | 10–12 m²/L | 50–60 m² |
| Masonry paint | 5–8 m²/L | 25–40 m² |
| Exterior paint | 6–9 m²/L | 30–45 m² |
The exact coverage rate for any product is printed on the tin label. Budget lines and premium formulations vary more than most people expect — even within the same brand and finish. Checking the number before you buy takes thirty seconds and prevents a wasted second trip.
How much wall area do common rooms have?
Most people buy a 5L tin without measuring first, relying on an estimate. That works for small rooms and leaves you short in larger ones.
Small bathroom (roughly 2.2m × 1.8m, 2.4m ceiling): around 20–22 m² of paintable wall area, minus the shower enclosure and window. One 5L tin covers it easily in two coats, with a litre or more to spare.
Single bedroom (roughly 3.2m × 2.8m, 2.4m ceiling): around 28–32 m² of wall area after a door and one window. A 5L tin of standard emulsion covers this in two coats with a small buffer — though you'll have little margin if the coverage rate is at the lower end.
Standard double bedroom (roughly 4m × 3.5m, 2.4m ceiling): around 35–38 m² of wall area. A 5L tin at two coats gives 25–30 m², which is not enough. You need approximately 7–8 litres. The right combination is a 5L tin plus a 2.5L tin.
Living room or open-plan kitchen (roughly 5m × 4m, 2.4m ceiling): around 45–52 m² of wall area, often more. One 5L tin covers it in a single coat, but two coats require 9–11 litres total. Two 5L tins is the typical purchase for this size room.
What reduces coverage in practice
Surface condition. Manufacturers quote coverage rates for smooth, sealed surfaces. New plaster absorbs significantly more paint — assume 8–10 m²/L rather than 10–12 m²/L for first-coat application to bare plaster. The second coat on sealed plaster returns to normal coverage.
Dark to light colour changes. Painting a light shade over a dark colour typically requires three coats for an even finish rather than two. Factor this into your litres calculation before you buy. A third coat of a 5L tin at 25–30 m² coverage may leave the job incomplete on a larger room.
Textured surfaces. Textured ceilings, rough render, and pebbledash dramatically reduce coverage. Masonry paints on rough brick may cover as little as 4–5 m²/L in practice. Use the lower end of the manufacturer's stated range as your starting figure on any non-smooth surface.
Method of application. Rolling applies paint more efficiently than brushwork alone. The most economical approach is to cut in around edges and corners with a brush, then roll the main wall surface. Brush-only application on large areas increases paint consumption by roughly 10–15%.
Getting the tin combination right
Paint is sold in 1L, 2.5L, 5L, and 10L tins. The right purchase is whatever gets you just above your calculated requirement, not below.
If you need 7.2 litres, buying a 5L and a 2.5L (7.5 litres total) is the correct call. Two 5L tins gives you 10 litres and wastes nearly 3. If you need 6.1 litres, a 5L and a 1L sample tin is the most economical combination.
One rule that applies regardless of tin size: buy everything from the same batch number. Paint colour varies slightly between manufacturing batches, and mixing batches mid-wall produces a visible line between the two applications. The batch number is printed on the base or side of the tin. At most retailers you can check this before purchasing.
If you're painting a large room and need multiple tins, Dulux Matt Emulsion is widely available across UK retailers in consistent batch production, making it easier to source matching tins without relying on a single shop's stock.
Calculate your exact paint requirement
The most common mistake is rounding down. People estimate, take a number off because the accurate figure means spending more upfront, and then have to make a second trip — often to find a different batch that doesn't quite match.
Enter your room dimensions, ceiling height, number of coats, and the coverage rate from the tin label. The result includes a 10% waste buffer for edges, touch-ups, and waste.
Paint Calculator — how many litres do you need?
Paint Calculator
When a 5L tin is the right call
A 5L tin is enough if you're painting a small bathroom or box room in two coats, refreshing a single bedroom over a similar colour, or covering an accent wall in a larger space. In those cases the 5L is the correct purchase and you'll have a small amount left for touch-ups.
A 5L tin is not enough if you're painting a double bedroom or larger room in two coats, covering a dark base colour with a light shade (which typically needs a third coat), or working with a textured surface that absorbs more paint than the coverage rate suggests.
In practice, measuring before you buy takes five minutes and saves both the cost of a wasted return trip and the risk of a batch mismatch.
