Linen count (lea):

The number of hanks of 300 yards in a pound is called linen count (lea). It is specially used to express the fineness of flax (linen) yarn. The yarn becomes finer when the count increases in this system.

If the weight of yarn is w grams, and the length of yarn is L meters then the lea count of yarn is obtained as follows.

The relation between new English count (Ne) and linen count(lea):

The relation between new English count Ne and linen count can be derived as follows:

Suppose that the new English count of yarn is Ne and linen count is a lea.

The relation between the new metric count (Nm) and linen count(lea):

The relation between the new metric count (Nm) and linen count(lea) can be derived as follows:

Suppose that the new metric count of yarn is Nm and the linen count of yarn is Lea.