Fishing Knot Strength Calculator

Calculate the effective strength of fishing knots based on knot type, line material, and line test rating.

Knot Type

Line Material

Line Test Rating

Tab to move between fields

Knot Strength

95%

Effective Strength9.5 lb

Breaking Point9.5 lb

Recommendation Score9.3 / 10

How to Use This Calculator

Select the knot you plan to tie — Palomar, Improved Clinch, Uni, Blood, or Surgeon's.
Choose your line material: monofilament, fluorocarbon, or braided line.
Enter the line's rated test strength in lbs (printed on the spool).
Read Knot Strength (%) to see how much rated strength the knot retains.
Check Effective Strength in lbs — this is the actual force at which the knot will fail.
Use the Recommendation Score to compare knot-line combos and choose the best option for your setup.

What each input means

Knot Type: The type of knot you plan to tie. Palomar is the strongest all-around; blood knot is used for joining two lines.
Line Material: Line material affects knot grip. Braid is slippery and some knots slip; mono is most forgiving.
Line Test Rating: The rated breaking strength of your line in pounds. The knot will reduce this.

Knot Strength: Percentage of the line's rated strength retained with this knot.
Effective Strength: Actual breaking strength of the line at the knot.
Breaking Point: The force at which the knot is expected to fail.
Recommendation Score: Overall rating considering knot strength, ease of tying, and reliability with your line type.

Identify Input Parameters
Knot Type = 0, Line Material = 0, Line Test Rating = 10 = 3 input(s) provided
Calculate Knot Strength
Knot Strength
95 = 95
Calculate Effective Strength
Effective Strength
9.5 = 9.5
Calculate Breaking Point
Breaking Point
9.5 = 9.5

Engine last updated July 28, 2026. Checked against 2 independently-derived tests — how we verify calculators.

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