Fly Rod & Line Matching Calculator
Find the right fly rod weight, leader length, and tippet size for your target species and water type.
Enter hook size (2, 4, 6, 8, 10, 12, 14, 16, 18, 20...) to get tippet recommendation
Recommended Setup
5-weight
Line Weight9 ft
Rod LengthMedium (mid-flex)
Rod Action9–12 ft
Leader LengthTippet: 5X (2.5–4 lb) — #14–#20
Rule of 3: Hook size 14 ÷ 3 = 5X tippet. 2.5–4 lb test.
Tippet Size Chart (Rule of 3)
| Tippet | Diameter | Break Strength | Hook Size Range |
|---|---|---|---|
| 7X | 0.004" | 1–2 lb | #20–#28 (midge) |
| 6X | 0.005" | 1.5–2.5 lb | #18–#24 |
| 5X | 0.006" | 2.5–4 lb | #14–#20 |
| 4X | 0.007" | 4–6 lb | #10–#16 |
| 3X | 0.008" | 6–8 lb | #6–#12 |
| 2X | 0.009" | 8–12 lb | #4–#8 |
| 1X | 0.01" | 10–14 lb | #2–#6 (streamers) |
| 0X | 0.011" | 12–16 lb | #1/0–#4 (large streamers) |
Frequently Asked Questions
A 9-foot 5-weight is considered the most versatile all-around trout rod — it handles everything from small streams to large rivers. For small streams, a 3–4 weight is more delicate and enjoyable. For big rivers, nymphing, or streamer fishing, a 6-weight provides more power. The 5-weight is the best starting point for new fly fishers.
Tippet is the finest section at the end of your leader to which the fly is attached. It is typically 2–4 feet of monofilament in the appropriate diameter. Matching tippet size to fly hook size is critical — too heavy and the fly won't drift naturally; too light and it will break on hooksets or when fighting fish. Use the Rule of 3: divide the hook size by 3 for the X-rating.
Leader length depends on water type and conditions. Small streams: 7–9 ft. Standard rivers: 9–12 ft. Stillwater (lakes, ponds): 12–15 ft for maximum stealth. Windy conditions or large flies (bass, pike): 6–7.5 ft for easier casting. Start with a 9 ft leader for most situations and adjust from there.
Rod action describes where the rod bends during a cast. Slow action rods bend deep into the butt section — great for delicate presentations and small streams. Fast action rods bend only near the tip — more powerful, better for wind, distance, and heavy flies. Medium action is the best balance for most trout fishing and is generally recommended for beginners.