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How Much Paint Do You Need?

Built by Kevin Glover · @gloverbuilds · Verified formula

Calculate gallons of paint needed for any room. Enter dimensions, number of coats, and get the exact amount with cost estimate.

📅 Updated April 2026 ✅ Formula verified 📖 4 min read 🆓 Free · No sign-up

In this article

How to Calculate Paint Coverage
When You Need More Paint
Paint Quality Matters

Die Berechnung

1 Liter deckt 6-8 m² (deckend in 1 Anstrich). Umfang × Höhe - Türen (1,8 m²) - Fenster (1,2 m²) × Anstriche ÷ 7. Zimmer 4×3,5 bei 2,50 m, 2 Anstriche: ~6-7 Liter. In Deutschland: Alpina, Caparol und Schöner Wohnen sind die beliebtesten Marken.

Anstriche

1 Anstrich: nur Auffrischung gleicher Farbe. 2: Farbwechsel. 3: Dunkel zu Hell. Grundierung bei starkem Farbwechsel spart Deckfarbe.

⚡ CalcWolf Insight

Benjamin Moore and Sherwin-Williams premium paints cover 400+ sq ft per gallon vs 300 sq ft for budget paints. At 2 coats on a 12×12 room, premium requires 2 gallons ($120) while budget requires 3 gallons ($84) — premium is only $36 more and looks significantly better.

Frequently asked questions

Wie viel für ein Schlafzimmer?▾

12 m² Raum (35 m² Wand), 2 Anstriche: ~7-8 Liter. 10-Liter-Eimer reicht meist.

Welche Marke?▾

Alpina und Caparol: beste Deckkraft. Schöner Wohnen: gute Farbauswahl. Baumarkt-Eigenmarke: für große Flächen.

✓ Math logic verified against primary sources → See our verification process

Kevin Glover · @gloverbuilds

Founder, CalcWolf · GLVTS · Blickr

All formulas sourced from primary references — IRS publications, peer-reviewed research, and official standards. Results are tested against independent reference calculators before publishing. Rates and brackets updated when official sources change. Editorial policy →