Recommended Sett
13 epi
Warp Ends
312
Range
12-14
Recommended Sett
13
ends per inch
Working Range
12 to 14
Warp Ends
312
Suggested Reed
6-dent
Ends Per Dent
2.2
| Structure | WPI Factor | Cloth Feel |
|---|---|---|
| Plain Weave | 50% | Firm, balanced |
| Twill | 42% | Soft drape |
| Basket Weave | 45% | Textured |
| Lace | 33% | Open, airy |
| Rug | 25% | Open warp |
As an Amazon Associate, we earn from qualifying purchases.
Inputs
Result
Sett = 24 × 0.50 (plain) × 1.05 (cotton) × 1.0 (balanced) = 12.6, rounded to 13. Warp ends = 24 × 13 = 312. Best reed = 6-dent at 2.2 ends/dent.
Inputs
Result
Sett = 30 × 0.42 (twill) × 0.95 (wool) × 1.15 (warp-faced) = 13.76, rounded to 14. Warp ends = 15 × 14 = 210. Best reed = 8-dent at 1.75 ends/dent.
Sett is the number of warp ends per inch (EPI) in the reed. It determines how open, balanced, or firm the cloth becomes. A 24 WPI cotton yarn at plain weave gives about 13 EPI sett.
| Yarn WPI | Plain Weave Sett | Twill Sett |
|---|---|---|
| 12 (bulky) | 6–7 epi | 5–6 epi |
| 18 (worsted) | 9–10 epi | 8–9 epi |
| 24 (sport) | 12–14 epi | 10–12 epi |
| 30 (fingering) | 15–17 epi | 13–15 epi |
Plain weave interlaces on every pick, creating the most friction between threads. This means it needs a tighter sett. Twill, lace, and rug structures interlace less frequently and use progressively more open setts.
| Structure | WPI Factor | Characteristic |
|---|---|---|
| Plain | 50% | Firm, balanced |
| Twill | 42% | Soft drape, diagonal pattern |
| Basket | 45% | Textured, paired threads |
| Lace | 33% | Open, airy, light |
| Rug | 25% | Open warp, packed weft |
Different fibers compress differently. Cotton and linen are less compressible than wool, so they need slightly higher sett (5–12% more EPI) for equivalent coverage.
Cloth balance describes the relative prominence of warp vs weft in the finished fabric. Balanced cloth shows equal warp and weft. Warp-faced cloth needs a tighter sett to cover the weft; weft-faced needs a looser sett.
The calculator suggests a reed that gives close to 2 ends per dent, which is the easiest sleying pattern. For example, 13 EPI works best in a 6-dent reed (2.2 ends per dent).
Read our guide
Estimate warp and weft yardage for weaving projects
Calculate yarn amounts for knitting and fiber arts
Plan fiber amounts for handspun yarn
Convert between gauges and adjust patterns
Explore weaving, yarn, knitting, and other fiber-art planning tools.
Last Updated: Apr 19, 2026
This calculator is provided for informational and educational purposes only. Results are estimates and should not be considered professional financial, medical, legal, or other advice. Always consult a qualified professional before making important decisions. UseCalcPro is not responsible for any actions taken based on calculator results.