Home :

AFFTA Approved Fly Line Weight Specifications
We have listed the fly line weights as they relate to actual weight of the fly line in grains or grams. This is a measure of the weight of the first 30' of fly line excluding the level tip which attaches to the leader. This is the standard set by the AFFTA. For practical purposes; the larger the fly line size, the larger fly it will cast.

Line Weight

Weight in Grains

Low

Target

High
1 54 60 66
2 74 80 86
3 94 100 106
4 114 120 126
5 134 140 146
6 152 160 168
7 177 185 193
8 202 210 218
9 230 240 250
10 270 280 290
11 318 330 342
12 368 380 392
13 435 450 465
14 485 500 515
15 535 550 565

 

Line Weight

Weight in Grams

Low

Target

High
1 3.50 3.90 4.30
2 4.80 5.20 5.60
3 6.10 6.50 6.90
4 7.40 7.80 8.20
5 8.70 9.10 9.50
6 9.90 10.40 10.90
7 11.50 12.00 12.50
8 13.10 13.60 14.10
9 14.90 15.55 16.20
10 17.50 18.15 18.80
11 20.60 21.40 22.20
12 23.80 24.60 25.40
13 28.20 29.20 30.20
14 31.10 32.40 33.70
15 34.30 35.60 36.90