It can be assumed as a general rule that as the knot count increases the cost of the rug will increase especially when buying a new rug.
What is a good knot count in rugs.
If you only see colored elements in pairs you need to count each pair as one knot.
In actuality good quality persian rugs can range in knot count from 85 kpsi like this heriz to over 500 kpsi like this qum.
The more knots the longer it takes to make.
A good general rule to follow when counting knots is.
Flip your carpet over so the face of the rug is down and the knots on back are exposed.
Persian rugs persian rug guides persian oriental knots how are knot counts measured.
Take into consideration that a rug that is 3 4 inches longer than the standard size eg a rug that is 3 3 x 5 3 may be still be an 11 22 quality rug in design size but due to the slightly larger size in actuality the knots per square inch may measure.
Count the knots in 3 4 areas of a rug to get a more certain idea of the knot count.
The easiest but the most deceptive of the rug quality indicators is the concept of kpi or knots per square inch kpi is calculated by multiplying the horizontal knot count times the vertical knot count in a one inch area of the carpet.
There are various measurements involved in the different areas when establishing how fine a rug is woven.
For the rug below what may appear to be two knots is actually a double ply yarn.
The main measurement is kpsi knots per square inch similar to the pixels on a tv or computer screen the more pixel or knots the clearer and.
If you see many single colored elements the rug has offset warps and each element should be counted as one knot.