Deck stain protects wood from weather, UV damage, and moisture while enhancing natural beauty. This calculator determines how much stain you need based on deck size and wood condition.
Coverage rates vary significantly by wood type and condition. Smooth or previously sealed wood covers 300-350 sq ft per gallon. Rough, weathered, or new wood absorbs more stain, covering only 150-200 sq ft per gallon. Two coats provide optimal protection and color depth.
Choose between transparent, semi-transparent, and solid stains. Transparent shows wood grain but needs recoating every 1-2 years. Semi-transparent offers moderate protection and color, lasting 2-3 years. Solid stain provides maximum protection and lasts 4-5 years but hides grain.
Clean and prepare decks before staining. Remove old stain if peeling, sand rough spots, and clean with deck cleaner. Apply stain when wood is dry and temperatures are 50-90F. Avoid direct sun and rain for 24-48 hours after application.
Quick Tips
- Always order 10-15% extra materials for waste
- Check local building codes before starting
- Measure twice, cut once — verify all inputs
Frequently Asked Questions
Smooth wood: 1 gallon per 300 sf. Rough wood: 1 gallon per 200 sf per coat.
Two coats for best protection and color depth.
Stain penetrates wood and shows grain. Paint creates surface film and hides grain.
Every 2-3 years for semi-transparent, 4-5 years for solid stains.
Yes if old stain isn't peeling. Clean thoroughly and apply compatible product.