How do I calculate how much siding I need?

Start with all square and rectangular walls, measuring height and width. Siding is ordered in “squares”. One square equals 100 square feet, so multiply height x width, then divide by 100 for total “squares”. If you are using different materials on different walls, you will want to keep these separate.

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How much siding do I need for a 2000 square foot house?

Siding costs between $3 and $11 per square foot with the average homeowner spending $4,300 to $15,800 to install on a 2,000-square-foot home. The total cost to replace siding depends on the size of your home, the number of stories, and the materials used.