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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

Rendement

Bois lisse : 8-12 m²/L. Bois scié : 5-8 m²/L. Bois ancien : 4-6 m²/L. Toujours 2 couches. Terrasse de 20 m² : 40 m² (2 couches) ÷ 7 = ~6 litres. Appliquez entre 10-30°C sans pluie prévue dans les 48h.

Application

Poncez légèrement entre les couches. Pour les grandes surfaces : pulvérisateur + retouche au pinceau est la méthode la plus rapide et uniforme. La préparation (lavage + séchage 48h) est le facteur le plus important pour la durabilité.

⚡ 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
Combien pour une terrasse de 20 m² ?▾
2 couches : 5-7 litres selon la porosité du bois.
À quelle fréquence ?▾
Surfaces horizontales : tous les 2-3 ans. Verticales : 3-5 ans. Si l'eau s'absorbe : il est temps de refaire.
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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 →
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