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LeaderCalc

Select the desired specifications for your leader and press "Find leaders" to look up suggestions.

Quick use

December 2019: The LeaderCalc pages have been slightly updated with more leaders and new facilities.
Using the form above you can ask LeaderCalc to caculate and show you a number of fly fishing leader formulas meeting your selected criteria. You can read more about this new tool here.
Leadercalc currently contains 2791 leaders for fly fishing, so there are enough to choose from.

Below you see a couple of randomly selected knotted, tapered leader formulas. Click on the name, category or other elements to see more.

Randomly selected: Dry, Flat Water Delicate

Category: Dry Fly Leaders
NameSectionsTippetLengthLineFormula

6X - 10.0'
Show all variations

76X
0.0050"		10.0'3-6wt.
10" of 0.0180 (06X)
19" of 0.0130 (01X)
19" of 0.0110 (0X)
13" of 0.0090 (2X)
15" of 0.0080 (3X)
17" of 0.0070 (4X)
27" of 0.0050 (6X)
Save | Labels

Randomly selected: Orvis Standard

Category: Name-Specific Formulas
NameSectionsTippetLengthLineFormula

5X - 9.5'
Show all variations

95X
0.0060"		9.5'4-6wt.
30" of 0.0210
15" of 0.0190 (07X)
13" of 0.0170 (05X)
11" of 0.0150 (03X)
6" of 0.0130 (01X)
6" of 0.0110 (0X)
6" of 0.0090 (2X)
6" of 0.0070 (4X)
21" of 0.0060 (5X)
Save | Labels
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