How to convert Single yarn strength SYS CN strength to CLSP or RKM 

SYS stands for single yarn strength. 
 
 

CN/0.9807 = SYS 
and then 
SYS X 1.6934 X actual count / 1000 x 156.2 = CLSP 
 
If you want to convert this CLSP into RKM please divide it by 156.2 
 
CN is yarn strength in centinewton. 

Hope this short calculation for Converting CN to CLSP/RKM was helpful for you.