Selling by size shouldn't mean shoppers do math. Spark Kit adds a measurement price calculator to your product pages: shoppers enter their dimensions, instantly see how many boxes or units they need, and add that exact quantity to cart, so checkout always matches. Built for flooring, tile, wallpaper, fabric, and made-to-measure or cut-to-size orders sold by square footage, length, or volume. Start from a ready-made template, adjust the formula per product, and add a waste allowance for cutting.