Tippet Size Calculator
Tippet that is too thick makes a small fly swim unnaturally, too thin and you break off fish. Enter your hook size.
Result
- Tippet size
- 5X (or 4X to 6X)
- Diameter
- about 0.006 in
- Typical nylon strength
- 4-5 lb
Go one size heavier for big fish, heavy structure or streamers, and one lighter for clear, slow water and spooky trout.
How this calculator works
The rule of 3: divide the hook size by 3 to get the tippet X size, then use that size or one either side. Diameter in inches is roughly 0.011 minus X divided by 1000. Breaking strengths vary by brand and material, so the range shown is typical nylon.
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