Calcolatore di Pittura

Ultimo aggiornamento: 2026-06-23

Usa il Calcolatore di Pittura per ottenere risultati precisi. Inserisci i valori qui sotto.
Dati di ingresso
Risultati
Inserisci i valori e premi Calcola
Common Sizes — Click to Fill
Lunghezza parete (m) Altezza parete (m) Numero di mani (pcs) Tipo di pittura Area porte e finestre (pcs)
10 m 2.5 m 2 pcs 1 2 pcs
12 m 2.5 m 2 pcs 1 3 pcs
14 m 2.7 m 2 pcs 1 3 pcs
16 m 2.7 m 2 pcs 1 4 pcs
20 m 3 m 3 pcs 1 4 pcs
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Cos'è il Paint Coverage Calculator?

A common DIY mistake is buying paint by guessing — either running short halfway through the second coat or ending up with cans you'll never use. This calculator measures the paintable wall area, subtracts doors and windows, and divides by your paint's coverage rate per litre to give you an exact purchase quantity by number of coats.

You may also find the Wallpaper Calculator, Backsplash Tile Calculator, and Crown Molding Calculator useful.

Chi usa questo calcolatore?

This tool is used by homeowners painting a room, professional painters quoting jobs, and property managers budgeting for interior refreshes.

Come usare the Paint Coverage Calculator

  1. Inserisci Wall length.
  2. Inserisci Wall height.
  3. Inserisci Number of coats.
  4. Inserisci Paint type.
  5. Inserisci Doors & windows area.
  6. Fai clic su Calcola per vedere i risultati immediatamente.

Formula

The calculator uses the following formula:

Paintable area = (perimeter × height) - doors_windows; Litres = area × coats ÷ coverage_per_litre

Esempio di calcolo

A 5 m × 4 m room with 2.7 m ceilings, 2 coats, one door, and two windows has about 43 m² of paintable surface. At 12 m²/litre coverage: 3.6 litres needed, so buy two 2-litre tins.

Calcolo passo dopo passo

  1. Total wall area: 4 × 14 m × 2.5 m = 140 m² (for a square room — adjust for actual perimeter)
  2. Subtract doors/windows: 3 × 2 m² = 6 m² → 134 m² paintable
  3. Standard paint: 10-12 m²/litre; 2 coats: 134 × 2 ÷ 11 = 24.4 litres
  4. 5L cans: ceil(24.4 ÷ 5) = 5 cans

Errori comuni da evitare

  • Using the floor area instead of the wall area
  • Forgetting that dark colours or stained walls need 3 coats instead of 2
  • Not accounting for texture — rough or porous walls absorb 20-30% more paint
Pro Tip: Dark colours and reds typically need 3 coats for full coverage, not 2. If you are painting dark over light or changing colour dramatically, use a tinted primer first — it reduces the number of topcoats needed.

Domande frequenti

What is standard paint coverage per litre?
Most interior wall paints cover 10–14 m² per litre per coat. Quality paints are often at the higher end (13–16 m²/L). Exterior paints cover 8–12 m²/L. Primers typically cover 8–12 m²/L. Always check your specific product's data sheet.

Do I need to subtract doors and windows from my paint calculation?
Yes — a standard door is about 1.8 m² and a window 1.5 m². This calculator lets you inserire il number of each and deducts them automatically. Skipping this step overestimates paint by 10–20% in a typical room.

How many coats of paint should I apply?
Two coats are standard for most interior repaint jobs. New plasterboard or a drastic colour change may need 3 coats. One coat is sufficient only for touch-ups or very similar colour-on-colour.

Should I paint walls or ceiling first?
Always paint the ceiling first, then walls from top to bottom. This way any drips or spatters on the wall get covered when you paint the wall. Paint skirting boards last.

How do I calculate paint for a room with vaulted ceilings?
For a triangular vault, add (0.5 × width × height of triangle) to the rectangular wall area below. For a curved vault, measure the arc length and multiply by the room length.

Scritto e revisionato dal team editoriale di CalcToWork. Ultimo aggiornamento: 2026-06-23.

calcto.work — Calculated on 2026-06-23