Calculators
Wall Paint Calculator (Metric)
Metric throughout: metres, square metres, litres. Preset room is 3.6 by 3.6 m with 2.4 m ceilings.
Default coverage is 9 sq m per litre.
| Surface | Room | Area | Coats | Coverage | Buy |
|---|---|---|---|---|---|
| Walls | Room | 31.3 sq m | 2 | 9 | 7 litres (or 2× 4-litre buckets) |
Assumptions
- Surface type: Previously painted, smooth (×1)
- Wall/ceiling coverage: 9 sq m/L
- Primer coverage: 8 sq m/L
- Default door opening: 1.85 sq m
- Default window opening: 1.4 sq m
- Trim estimate width: 0.08 m (rough)
Supplies checklist
- Painter's tape — 1 roll
- Drop cloths
- Roller covers — 2–3
- Angled brush
- Roller tray liners
- Spackle / filler
- Sandpaper
Estimates only. Check the coverage figure on your product before buying.
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