Skip to content
CalcWolf DIY Calculadora de Cobertura de Stain/Verniz
DIY

How Much Stain Do You Need?

Calculate gallons of stain for decks, fences, and furniture based on surface area and wood type.

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

Rendimento

Madeira lisa: 8-12 m²/L. Serrada: 5-8 m²/L. Antiga: 4-6 m²/L. Sempre 2 demãos. Deck de 20 m²: 40 m² (2 demãos) ÷ 7 = ~6 litros. No Brasil, Sayerlack, Osmocolor e Montana são as marcas mais usadas para stain.

Aplicação

Aplique entre 15-30°C sem chuva prevista em 48h. Lixe entre demãos com lixa 220. A preparação (lavagem + secagem 48h) determina 80% da durabilidade.

⚡ CalcWolf Insight

The single biggest staining mistake: not cleaning and prepping the surface. Stain applied over dirt, mildew, or old flaking stain will peel within a year. Power wash, let dry completely (48+ hours), and sand smooth before staining. Prep is 70% of the job — the actual staining is the easy part.

Frequently asked questions
Quanto para deck de 20 m²?
2 demãos: 5-7 litros. Stain no Brasil: R$60-150/litro.
A cada quanto reaplicar?
Superfícies horizontais (deck): 1-2 anos. Verticais (cerca): 2-3 anos.
✓ Math logic verified against primary sources → See our verification process
Kevin Glover
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 →
🐛 Report a Calculator Error
Found a bug or outdated data? Reports go directly to Kevin and are reviewed personally.