Knot Strength Calculator

Estimate a fishing knot effective breaking strength from its efficiency rating

Frequently Asked Questions

What is knot efficiency?

Knot efficiency is the percentage of a line rated breaking strength that the knot actually holds. A 95% knot on 20-pound line holds about 19 pounds before failing at the knot.

Which fishing knot is the strongest?

The FG knot (about 98%) and the Palomar (about 95%) are among the strongest practical knots. The Palomar is especially popular for braid and direct-tie connections.

How do I calculate effective breaking strength?

Multiply the line test by the knot efficiency and divide by 100. For 20-pound line tied with an 88%-efficient Improved Clinch, effective strength is about 17.6 pounds.

How can I make my knots stronger?

Lubricate the knot with water or saliva before cinching to prevent friction heat, seat it slowly and fully, and leave an adequate tag end so it cannot slip.

Fishing & Hunting Disclaimer: Estimates only. Verify regulations and practice safety.

This calculator is for educational and informational purposes only. Bag limits, seasons, legal methods, and equipment rules vary by state and locality and change frequently, so always confirm current regulations with your state wildlife agency before fishing or hunting. Follow all firearm and tree-stand safety practices.