Deck Stain Calculator

Calculate deck stain or sealer needed from deck dimensions. Accounts for railings, stairs, multiple coats, and coverage rate to give gallons and quarts needed.

How to Use Deck Stain Calculator

The Deck Stain Calculator determines how much stain or sealer you need for your deck project. Enter your deck length and width, then optionally add railing length and height, number of stairs, and stair width. Select the number of coats (1-3) and enter the product coverage rate (typically 150-300 sq ft per gallon). The calculator computes total surface area including railings (both sides) and stairs, then tells you exactly how many gallons or quarts to purchase. Saves money by preventing over-buying and avoids project delays from under-buying.

Step-by-Step Instructions

  1. Enter deck length and width in feet
  2. Add railing length and stair count if applicable
  3. Select number of coats and coverage rate
  4. View gallons and quarts of stain needed

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