Fishing Line Gauge Calculator
Gauge ↔ diameter (mm) ↔ pound (lb), by material
Line Conversion
Result
0
※ Diameter = 0.165 × √gauge (Japanese standard). Nylon/fluoro lb is approximate (≈gauge×4); PE braid varies by maker, shown as a range.
Details
⚠️ This calculator is a reference tool based on the standard line/sinker specifications (gauge-to-diameter) established in Japan and also used in Korea, plus publicly available conversion data. Real products vary in diameter, strength (lb) and weight for the same gauge depending on material (nylon, fluorocarbon, PE braid), maker, number of braided strands (4/8) and coating, so results may differ from the product label. PE braid lb ratings in particular vary widely by maker, so treat them as a range and always check the product label for exact values. calcstool.com assumes no liability for tackle choices, equipment damage, accidents or fishing outcomes based on these results.
FAQ
How do I convert line gauge to lb?
Gauge (号) is thickness; lb is strength. Diameter(mm)=0.165×√gauge is the standard, while strength is about gauge×4 lb for nylon/fluoro and gauge×16-23 lb for PE braid.
What is 1 go in mm?
By the Japanese standard, 1号=0.165mm, 2号=0.235mm, 3号=0.285mm, 10号=0.52mm, from diameter=0.165×√gauge.
Why is PE braid a range?
PE braid is rated by denier (weight), not diameter, and strength varies with strand count (4/8) and maker, so lb differs for the same gauge. Check the product label.
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