LeaderCalc

Please notice: LeaderCalc hasn't been optimized for small screens. Turning some devices horizontally might make it easier to use, but using a suitably large screen is the best solution.
Select the desired specifications for your leader and press "Find leaders" to look up suggestions.
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The most advanced and comprehensive fly fishing leader tool online ... well, basically anywhere!

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 the selection tool here.
LeaderCalc currently contains 2973 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.

Category: Dry Fly Leaders

1 variation, 5X, 10.5'

Name Sections Tippet Length Line Formula

Dry, Harvey Dry Fly Variation


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 7 5X
0.0060"		 10.5'
(9.0-11.5')		 2-4wt.
18" of 0.0150 (03X)
18" of 0.0130 (01X)
18" of 0.0110 (0X)
12" of 0.0090 (2X)
12" of 0.0080 (3X)
18" of 0.0070 (4X)
30" of 0.0060 (5X)
Category: Dry Fly Leaders
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Category: Saltwater
A simple three section leader well suited for Baltic style saltwater. Use a leader at least a rod length, preferably longer where conditions allow it. The leader is well suited for shooting heads and works best with flies in the 8-2 range.

1 variation, 3X, 12'

Name Sections Tippet Length Line Formula

Martin's simple Baltic leader


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 3 3X
0.0080"		 12'
(9.0-12.0')		 5-7wt.
72" of 0.0140 (02X)
29" of 0.0110 (0X)
43" of 0.0080 (3X)
Category: Saltwater
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Calculating...
Selecting all leaders will show you more than 2,500 leaders. Please narrow your criteria
Selecting All for two or more of your criteria can result in a lot of leaders and can potentially take some time to find. Consider narrowing your search... or just give it a go!

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