PE braid ratings: what PE 1.5, PE 2 and PE 5 actually mean in pounds

PE is a thickness, not a strength

A spool marked PE 2 is telling you how thick the line is. It is not telling you how much it holds. That one sentence resolves almost every question about PE ratings.

PE stands for polyethylene — the fiber family that every modern braid is made from. The number after it is the Japanese go size, a diameter ladder that Japanese line makers have used for decades and that carries over onto the braid they export. Each step up the ladder is a specific millimeter figure, and that figure does not change between brands.

What does change is the pound test printed next to it. Breaking strain depends on how many carriers the line has, how tightly it is woven, how much coating it carries and how the maker chooses to test it. An 8-carrier braid at PE 2 holds considerably more than a 4-carrier braid at PE 2, and both are correctly labeled.

The published PE table

This is Tasline’s own published conversion chart, reproduced as published. The diameter column is the go ladder; the two pound columns are Tasline’s figures for braid and for monofilament of the same thickness.

Two things in that table are worth stopping on. PE 6 and PE 8 publish almost the same diameter (0.405 and 0.407 mm) for a 20 lb difference in braid strength, which is a reminder that the ladder was built around nylon and gets loose at the heavy end. And the mono column climbs far more slowly than the braid column — which is the whole reason anyone fishes braid.

Where the published charts disagree

Here is the part no single chart will tell you. Asian Portal publishes its own go-size table, and at the same PE number it gives substantially higher pound figures than Tasline does.

The diameters are within a few hundredths of a millimeter of each other. The pound figures differ by 5 lb at PE 1, by 15 lb at PE 2 and by 20 lb at PE 5. Neither chart is wrong. They are describing different lines at the same thickness, and Asian Portal says so outright: “Line strength varies slightly depending on the manufacturer. Please use it as a reference value.”

So the practical rule is: treat PE as the diameter, and treat the pound figure as whatever the maker of your actual spool publishes. If a spool gives you PE 2 and 30 lb, both are true of that line.

The proof that PE is a diameter ladder

You do not have to take this on trust. Sunline is a Japanese line maker that publishes a diameter chart for its monofilament, in pounds, with no PE number anywhere on it. Lay it beside the PE ladder.

Nine rows, nine exact matches, from a chart that never mentions PE. Sunline builds its monofilament to the same go diameter steps, because that is what the ladder is: a list of thicknesses. Note also that Sunline’s published mono pound figures (4, 6, 8, 10 lb) sit well above Tasline’s “mono of the same diameter” column (3.5, 4.4, 5.8, 6.4 lb) — even the mono equivalence is maker-specific.

Converting PE to the braid actually sold in the US

Most US-market braid never prints a PE number. What it prints is a pound test and a diameter, which is all you need. These are the two braids whose published figures this site already uses, matched to the PE ladder by diameter.

PE 1.5 is the row that causes the most confusion, and the table shows why: at 0.205 mm it falls between two published steps on both braids. If you were told to buy PE 1.5 and you are shopping in the US, 20 lb is the honest answer on either brand. Our braid diameter chart has the full published tables for both.

Why your reel cares about the diameter and not the pounds

A reel’s published line capacity is a volume figure wearing a pound-test label. The spool holds a certain number of cubic millimeters of line, and thickness decides how many yards that is.

That is why PE is a genuinely useful number once you stop reading it as a strength. A reel rated for 130 yd of 10 lb mono is rated for roughly 0.26 mm line, which is PE 2.5 — so PE 2.5 braid fills it to the lip, whatever the pound test says on the box. Our reel size page works through the same arithmetic from the reel end.

When you will actually meet a PE number

Three situations, on a freshwater site like this one.

Japanese-domestic-market line. Daiwa, Shimano, Sunline, Varivas, YGK and others label in PE because that is the home market convention. If you are buying a JDM braid, PE is the only size you will be given. PE-labeled braid.

Bait finesse and micro-lure setups. The lightest end of the ladder — PE 0.4 to PE 0.8, 0.100 to 0.148 mm — is where the ultralight and BFS crowd live, and US pound-test labels get vague down there. Our ultralight rods page is the companion.

Reading a spec sheet or a forum post. Most of the time, you just need the millimeter figure so you can translate. That is what the table above is for.

What we are not going to tell you

There is no single authoritative PE-to-pound conversion, and any page that gives you one number per PE size is inventing precision. We have published two real charts that disagree by up to 20 lb precisely so you can see the size of the uncertainty.

We also have not measured any of this. Every figure on this page is a manufacturer’s or retailer’s own published number, and braid is a woven, flattening, irregular thing that does not really have one diameter at all — a point our diameter chart page makes at more length.