How much deck stain does one gallon cover?

Many stains cover 150-250 square feet per gallon per coat, depending on wood condition.

Should I use one coat or two?

Transparent and semi-transparent stains are often one coat; solid stains may need two depending on the product.

Yes. Rails, balusters, and stairs add surface area quickly, so include a railing allowance when possible.

Inputs

Change any field and the results update instantly. Use supplier specs when you have them.

Deck lengthftDeck widthftCoatsCoveragesq ft/galRailing lengthft

Tips & notes

Assumptions that most often change the final quantity in the field—so you order with clearer eyes.

Clean and dry the deck before staining so finish can penetrate evenly.

Weathered or rough boards absorb more stain than smooth new decking.

Include railing and stair surfaces if they will be stained too.

Follow recoat windows carefully to avoid tacky or uneven finish.

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