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Site /Materials /Paint quantity
How much paint for a 4×6 m room with a 2.7 m ceiling?
You'll need about 9.45 L of paint for two coats on the walls of this room, after deducting 2 m² for a door and window.
That's roughly 3 × 4 L tins, or 1 × 10 L if your brand stocks the larger size — buying the bigger tin is almost always cheaper per litre.
| Room size | 4 m × 6 m |
|---|---|
| Ceiling height | 2.7 m |
| Wall perimeter | 20 m |
| Gross wall area | 54 m² |
| Openings deducted | 2 m² |
| Net area to paint | 52 m² |
| Coats | 2 |
| Coverage | 11 m²/L per coat |
| Paint needed | 9.45 L |
Assumptions
- 2 coats at 11 m²/L coverage per coat — the /site/materials calculator defaults.
- 2 m² deducted for one door and one window combined; adjust this in the calculator if your room has more or fewer openings.
- Wall area only — perimeter × ceiling height. The ceiling itself is not included.
Check before you order: Coverage varies by brand, surface porosity, colour change and whether it's a feature or textured wall — check the tin's stated coverage rate and buy a little extra for a dark base coat.
How this is worked out & FAQ
How this is worked out
- Work out the wall perimeter: 2 × (length + width).
- Multiply by ceiling height for gross wall area, then subtract openings.
- Multiply the net area by the number of coats, then divide by the coverage rate.
FAQ
Does this include the ceiling?
No — this is wall paint only. Ceilings are usually a different (flat) finish and are best estimated separately using the room's floor area.
What if my room has more doors and windows?
Increase the openings deduction in the calculator — every extra 1 m² of opening reduces the area to paint by the same amount.
Why two coats?
Two coats is the standard practical minimum for even coverage and colour depth on new or repainted plaster — one coat rarely covers evenly.
Estimates only — allow for laps, cuts and site conditions. ← more paint quantity · All material calculators