Question 1

How many spray paint cans do I need for a mural?

Accepted Answer

It depends on wall size, the number of colours, and surface texture. The calculator uses: wall area × colour percentage × surface coefficient ÷ can coverage. A 50 m² smooth wall with 10 colours typically needs 25–40 cans.

Question 2

How do I calculate spray paint for a wall?

Accepted Answer

Upload your mural design — the calculator detects every colour, matches them to real paint codes from MTN 94, Montana, Molotow, Loop and others, then computes the cans you need based on wall dimensions and surface type.

Question 3

How much does it cost to paint a mural?

Accepted Answer

A standard 400 ml spray can covers ~1.5–2.5 m² and runs €4.50–€7.00. Acrylic bucket paint covers ~10 m² per litre. The calculator gives an exact estimate based on your design, brands and chosen currency.

Question 4

What spray paint brands work best for murals?

Accepted Answer

MTN 94 (smooth coverage, 200+ colours), Montana BLACK (high pressure for fills), Montana GOLD (premium low pressure), Molotow Premium (high pigment) and Loop (affordable). Most artists mix brands — the calculator supports multi-brand selection.

Question 5

Does wall texture affect paint coverage?

Accepted Answer

Yes. Smooth plaster is the baseline. Brick absorbs ~50% more paint, rough concrete ~30% more, wood ~20% more. The calculator applies the surface coefficient automatically.

Question 6

What brushes do you need for a mural?

Accepted Answer

For detail work: 10–30mm round or flat brushes. For fills and edges: 50mm flat brush. For large colour fields: 70mm water-based brush. A standard kit needs 4 pieces each of 30mm, 50mm, and 70mm, plus a detail set and a 10/20/30mm variety pack — all listed in the supply checklist.

Question 7

What rollers are best for painting a mural?

Accepted Answer

60mm rollers (4 per project) for tight areas and edges; 100mm rollers (5–7) for large flat fills. A wide 180mm primer roller saves time when priming the whole surface. Microfibre sleeves give the smoothest finish on plaster and concrete.

Question 8

How much primer do I need for a wall?

Accepted Answer

Allow ~100–150ml per m² for one coat on smooth plaster. A 10L bucket covers roughly 65–100m². Rough concrete, brick, or bare masonry often needs 2 coats — double the amount. Toggle the Wall primer item in the supply checklist for large outdoor jobs.

Question 9

What tools do you need to paint a mural?

Accepted Answer

Beyond paint: rollers (60mm + 100mm), brushes (30/50/70mm), 25+ mixing containers with lids, a paint tray, 48mm masking tape, silicone gloves, a 1.5–2m telescopic rod for high sections, a 100–150cm level for layout lines, rags, and a flat screwdriver to open cans. The supply checklist in the calculator lists all of them with sensible default quantities.

Question 10

How do you best lay out a mural design on a wall?

Accepted Answer

The fastest method is the Sketchar app on Meta Quest VR glasses — project your design directly onto the wall in augmented reality and trace proportions in daylight. No waiting for dark, no guessing by eye. Traditional alternatives (grid squares, night projector) work but take 4–8× longer to set up.

Mural Paint Calculator by Sketchar

Draw murals faster with Sketchar and VR Headset

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