Stain & deck · 6 min read
How to estimate deck stain gallons including floor boards, railings, steps, and vertical surfaces.
Try the calculator
Deck stain calculator →Length × width gives the main surface. A 12×16 deck = 192 sq ft. Add stairs (each tread + riser), top rails, balusters, and posts — these add 20–40% more area on many decks.
Power-washed bare wood drinks stain. Previously coated decks may need one coat. Always check manufacturer coverage after prep — our calculator lets you set coats and sq ft per gallon.
Coverage varies by formula, not just base. Use the number on your specific product label rather than rules of thumb.
Stain & deck
Calculate gallons for board-on-board, shadowbox, or privacy fence stain using length, height, and coverage per gallon.
5 min read
Exterior
Estimate stain for siding, logs, or exterior walls. Coverage, two-coat rules, and when to use our house stain calculator.
6 min read
Paint Calculator provides estimates for planning only — not professional painting advice. Verify quantities at your paint store. Read disclaimer