DIY

How Much Stain Do You Need?

Built by Kevin Glover · @gloverbuilds · Verified formula

Calculate gallons of stain for your deck, fence, or outdoor wood project by surface type, area, and wood condition.

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

In this article

Stain Coverage by Wood Type
Transparent vs Solid Stain
Application Tips

Rendimento

Madeira lisa: 8-12 m²/litro. Madeira serrada: 5-8 m²/L. Madeira antiga: 4-6 m²/L. Sempre 2 demãos mínimo. Deck de 20 m² × 2 demãos: 40 m² ÷ 7 = ~6 litros. No Brasil, marcas como Stain Sayerlack, Osmocolor e Montana são as mais utilizadas.

Aplicação

Aplique entre 15-30°C, sem chuva prevista em 48h. Lixe levemente entre demãos com lixa 220. Para decks: pistola + retoque com pincel é o método mais rápido e uniforme.

⚡ CalcWolf Insight

Oil-based stains penetrate deeper than water-based and last 20-30% longer on horizontal surfaces. However, water-based stains are easier to apply, dry faster, and clean up with water. For deck floors (heavy foot traffic), oil-based is worth the extra hassle.

Frequently asked questions

Quanto de stain para deck de 20 m²?▾

2 demãos: 5-7 litros dependendo da porosidade. Stain no Brasil: R$80-200/litro.

Com que frequência reaplicar?▾

Superfícies horizontais (deck): a cada 1-2 anos. Verticais (cerca): 2-3 anos. Se a água não perla mais: hora de reaplicar.

✓ 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 →