How Do I Know What Strength My Fishing Line Is?

Fishing line strength is essential for a successful fishing trip, as it plays a crucial role in determining the size of fish you can catch, as well as how well you can handle your catches. Knowing the strength of your fishing line will also help you make sure that you have the right kind of bait and tackle for the type of fish that you are Targeting.

The first thing to do when trying to determine fishing line strength is to look at the label on the spool. Most modern spools will be labeled with the pound test – or breaking strength – of the line.

This is usually expressed in either lbs (pounds) or kg (kilograms). The higher the number, the stronger the line. It is also important to note that while two different lines may have similar breaking strengths, they may be made from different materials and thus have different levels of abrasion resistance or other properties.

The next step is to actually test out your fishing line by tying one end to a fixed object such as a tree or a post and then pulling on it with increasing force until it breaks. If possible, it’s best to do this over a soft surface such as grass, so that any shock that results from sudden failure is minimized. To get an accurate measurement, use an appropriate scale such as a spring scale or digital scale.

You can also purchase specialized tools designed specifically for testing fishing lines. These usually consist of clamps that attach to each end of your line and then measure its breaking strength when pulled in either direction. The advantage of these tools is that they provide an immediate and precise measurement without having to test each individual strand.


Knowing the strength of your fishing line is an important part of ensuring a successful fishing trip. It can be determined by looking at its label or testing it with specialized tools or even just by pulling on it with increasing force until it breaks. Once you know what strength your line is, you can adjust your bait and tackle accordingly so that you are in the best position possible for catching larger fish.

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Emma Gibson