What Does the Test of Fishing Line Mean?

Fishing line is a crucial component of any angler’s arsenal, and the test of a fishing line is an important indicator of its strength and quality. The test of fishing line is a measure of the maximum amount of force it can withstand before breaking.

It is typically measured in pounds or kilograms, and the higher the number, the more powerful the line.

The type and quality of fishing line used can have a significant impact on an angler’s success. Most lines are made from nylon or monofilament, but some are constructed from other materials such as fluorocarbon or braided wire.

Each material has its own unique properties that make it better suited to certain types of fishing. For example, braided wire is highly abrasion-resistant and ideal for heavy-duty applications such as trolling for large fish.

The test strength of a particular type or brand of fishing line will vary depending on its construction, diameter, and length. Generally speaking, thicker lines have higher tests than thinner ones because they carry more load without stretching or breaking. Longer lines also tend to have higher tests than shorter ones because they can spread the load over a larger area.

Factors Affecting Test Strength

In addition to construction materials and length, there are several other factors that affect the test strength of a fishing line:

  • Temperature: Cold temperatures cause most lines to become stiffer and less elastic which leads to lower tests.
  • Knotting: Knotting reduces the overall strength of a line by up to 30%. This is why it’s important to use strong knots when attaching hooks or lures.
  • Abrasion: Over time, abrasion from rocks or other objects can weaken a line’s strength and decrease its test value.

When shopping for fishing line, it’s important to consider not only the type and quality but also its test value. A higher test indicates that it will be able to handle heavier loads without stretching or breaking. It’s also worth noting that different types of lines have different optimal applications; so even if two lines have similar tests, one may be better suited for certain types of fishing than another.


The test strength of fishing line is an important indicator that tells you how powerful it is and how well it will stand up against heavy loads and abrasive surfaces. By considering all factors including material construction, temperature, knotting technique, diameter and length you can select the best possible option for your particular type of fishing.

Photo of author

Emma Gibson