Deck Stain Calculator

This works out how much stain a deck takes, counting the railing properly rather than treating it as an afterthought. Enter the deck size, the linear feet of railing, the rail height and the baluster spacing, and it adds the four faces of every baluster, three faces of each rail and the posts to the floor area, then divides by a coverage rate. Coverage is set by whether the wood is planed, weathered or rough sawn, and the second coat is given its own higher rate because the first coat has already filled the grain; both figures can be overridden with whatever the tin says. The result is the area, the gallons per coat and the whole gallons to buy.