Yarn and thread are not only different materials but they are also used for different things. There may be exceptions; for example, a specially made thread can perform the same function as Yarn, like crocheting. However, this is unusual.
Table Summary
| Yarn | Thread |
| It is made from interlocking one or more fibers | It is made from tightly twisting multiple yarns |
| They are used in crocheting, weaving, and knitting. | It is used primarily for needlework such as sewing and embroidery |
| It cannot be used in sewing | Some threads are used in crocheting |
| It weighs more than threads but is not as strong. | Much lighter and Stronger than Yarn |
| They are classified according to the composite fibers | They are classified according to manufacturing methods |
Definitions
Yarn is a continuous strand of interlocked twisted natural or synthetic fiber. Yarn can be made from any textile fiber and is widely used for crafts like weaving, rope making, wire making, knitting, and embroidery. Yarn is divided into two types: staple yarn and continuous filament. It is also classified into mono-fiber and blended Yarn based on the composite fibers.
A thread is a long, thin strand of tightly twisted Yarn made of cotton, nylon, or other fibers. It is used at home for hand sewing and sewing machines. The majority of threads produced are used in commercial and industrial sewing,
Yarn VS Thread
Yarn is typically heavier than thread, but it is also less strong. An easy way to describe it is by ascribing thread as a specialized Yarn. Threads are primarily used for sewing, so they are made to be stronger to hold the clothes together. They are also used differently in fabric making. Threads are used for sewing fabric and embroidery, whereas Yarn is used for knitting, crocheting, weaving, and entire materials. A kind of thread used in crocheting is made for mercerized cotton and helps the garment maker etch patterns, as it is much thinner than Yarn.