Paint Calculator
How much paint do you need? Measure the room, set the coats, and get litres plus a tin size to take to the shop.
How much paint do you need? Measure the room, set the coats, and use the coverage on the tin. The result is litres to buy — not a paint specification.
How precise?
Measure
Type metres, or add mm / ft on the number — 4200 mm is fine.
Paint
Coverage is on the tin. 10 m²/L is a conservative starting point for walls.
Paint needed
11.4 L
About 11.4 L for 57.2 m² at 10 m²/L over 2 coats. Paint is sold in tins, so buy the next pack that covers it.
- Paintable area
- 57.2 m²
- Calculated
- 11.4 L
- Suggested purchase
- 1 × 10 L + 1 × 2 L · 12 L
- Based on 2 coats and 10 m²/L coverage.
- Ceiling included (15.1 m²).
- No doors or windows subtracted.
- No waste allowance added.
- Coverage varies by surface, paint, and application. This is not a specification.
Job summary
- Room
- 15.1 m² floor, 42.1 m² walls
- Paintable
- 57.2 m²
- Coats
- 2
- Coverage
- 10 m²/L
- Paint required
- 11.4 L
- Recommended purchase
- 1 × 10 L + 1 × 2 L (12 L)
Measurements stay in this browser. Nothing is uploaded.
Worked example
A 3.5 m by 4 m room, 2.4 m high, two coats at 10 m²/L, no openings, ceiling included, is 50 m². That is 10.0 L of paint. Tins come in 1, 2, 4, 10, and 15 L, so the suggested purchase is 1 × 10 L.
FAQ
- How much paint do I need?
- Enter the room, the coats, and the coverage on the tin. The result is litres, then a tin combination you can actually buy.
- Does it include the ceiling?
- Only when the ceiling box is ticked. Walls are included either way.
- How are doors and windows counted?
- In the precise mode: each door is 1.8 m², each window 1.2 m². Add extra area for a large slider.
- Should I buy the exact litres?
- No. Paint is sold in tins. The calculator shows the calculated litres and a suggested pack that covers it.
- Why isn’t coverage exact?
- It varies by surface, paint, and how you apply it. Use the figure on the tin. 10 m²/L is a conservative starting point.