| Quality | Knots/sq.in. | Knots/sq.ft. | Days/sq.ft. | Knots in a 9′ x 12′ Carpet | Time required to knot a 9′ x 12′ Carpet |
| “6/40” | 60 | 8,640 | 1.4 | 933,120 | 151 days (5 months) |
| “7/52” | 91 | 13,104 | 2.2 | 1,415,232 | 237 days (7.9 months) |
| “9/60” | 135 | 19,440 | 3.2 | 2,099,520 | 346 days (11.5 months) |
| “12/60” | 180 | 25,920 | 4.3 | 2,799,360 | 464 days (15.5 months) |
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