# Converting Yarn

I have a question about converting a yarn in project instructions. I have instructions that call for 10/2 pearl cotton sleyed at 24 ends per inch. I want to use 5/2 pearl cotton. How do I do the math to figure out how many ends at what number per inch of the 5/2 to use for the same effect?

Thanks,

Lucy

Hi Lucy,

First of all, you need to know the desired width of the piece you want to weave. Let's say it’s 20 inches. (At 24 ends per inch, you would have needed 480 ends of 10/2 cotton.) If you have the Master Yarn Chart, you can look up the sett for 5/2 cotton appropriate for the weave structure you are using. 24 epi is the sett for balanced plain weave in 10/2 cotton, so you’d probably be looking for the sett for balanced plain weave in 5/2 cotton, which is 16 epi.

To get a 20 inch width using 5/2, therefore, you’d need 320 ends.

Next, you need to look at the draft you plan to use. It may include a repeat that does not easily divide into 320 ends the way it divides into 480 ends. You might have to make some adjustments to the total number of ends, either more or fewer, to accommodate the number of repeats in the draft.