- 1). Measure the length and width of one baluster.
- 2). Multiply the length by the width. Multiply that figure by four.
- 3). Multiply your total from step 2 by the total number of balusters. This will give you the total square inches of surface area.
- 4). Divide your total square inches by 12 to determine the total number of square feet you need to paint.
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