How much stain for a deck?
Deck board area = length × width. Most deck stains cover 150–200 sq ft per gallon on horizontal boards. Add waste for rails and steps separately if needed.
Deck Stain Calculator
Measure deck board area as length × width. Default coverage is 175 sq ft/gallon — horizontal boards and weathered wood may need more.
Deck areas
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Project settings
Enter deck length × width. Horizontal boards often need 175 sq ft/gallon — check your stain label.
Default 10% for touch-ups
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Frequently asked questions
One coat or two on a deck?
Many deck stains are one-coat formulas on maintenance coats. Bare wood or a color change may need two. Adjust coats in the calculator.
Does this include railings?
Enter railing sections as additional deck areas, or add extra waste % to account for vertical balusters and posts.
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