Start from
Ne is the cotton count; Nm is metric (km per kg); tex, dtex and denier are grams per 1, 10 and 9 km.
Ply
In every system
Example30 Ne
Nm50.8
tex19.7
dtex197
Denier177
Length per kg50,801 m
Length per lb25,200 yd
Cost
Per 1,000 m$0.089
Per 1,000 yd$0.081
Per lb$2.04