What is KPSI (Knot Count per Square Inch) and is it important?
Many rug salespeople will tell you that the knot count per square inch is not important and that you should just pick the carpet you like. While this is true, it is only partly so. You should always pick the colors and designs that you find most appealing without considering the KPSI. Once you have picked a few rugs and want to narrow down your selection, you should look at the KPSI and then at the cost per square foot. Understand, the cost of a new rug to the store selling the carpet is based on the Knot Count and quality of weaving material used. For example: A 6 X 9 rug is 54 square feet. You have selected two 6 X 9 rugs with the same wool, dye, and a similar design, one with 64 KPSI and the other with 100 KPSI. The rug with the higher knot count should cost more. If the rugs are priced at approximately the same price, the seller is not pricing fairly. There are other considerations, of course. The higher the Knot Count, the more intricate the design can be while still showing sharp
