Fishing Gear Calculators & Tools
Free, practical calculators for the numbers behind your tackle — line strength, sinker weight, reel retrieve, leader length, fish weight, and rod power. Educational tools to help you gear up, not a substitute for on-the-water judgement.
Fishing Line Strength Selector
Pick a target species, the cover you're fishing, and your line type to get a recommended pound-test, a suggested pick, and the line's approximate diameter
Sinker Weight Selector
Enter the current, water depth, and rig to get a sinker weight that reaches and holds bottom — rounded to the nearest standard size in your tackle box
Reel Gear Ratio & Line Retrieve
Turn a reel's gear ratio and spool size into real inches-per-turn — how much line you pull in on one crank — and see whether it's a slow cranker or a fast burner
Leader Length Calculator
Choose your rig, water clarity, and main-line test for a recommended leader length and pound-test that balances stealth against strength
Fish Weight Estimator
Estimate a fish's weight from its length — and girth, if you have it — using the standard angler formulas, so you can weigh-and-release without a scale
Rod Power & Action Guide
Choose your target species and lure weight to get a recommended rod power and action, plus a suggested line range — curated from common angling setups