Tackle & technique calculators you can count on
Evidence-based calculators to help you rig up correctly, compare knots, and plan your trips. Simple, fast, and works offline at the water.
Gear Calculators
Optimize your line, reel settings, and rig weights for maximum casting and landing success.
Line & Leader Calculator
Calculate recommended main line test, leader material, test weight, and length based on species and water clarity.
Calculate →Sinker Weight Calculator
Calculate the exact sinker size needed to counteract depth, water currents, and line thickness drag.
Calculate →Reel Gear Ratio Guide
Match your lure presentation with the optimal reel gear speed ratio range and winch torque.
Calculate →
Technique & Care Guides
Compare knot strength, monitor tide timelines, track barometric pressure, and optimize livewell settings.
Knot Strength Reference
Compare common fishing knots, filter by line type, see strength retention percentages, and view step-by-step instructions.
Calculate →Tide & Current Calculator
Search NOAA tide stations and fetch high/low tide predictions to plan optimal feeding windows.
Calculate →Solunar Bite Predictor
Calculate major and minor daily fish feeding windows based on sun and moon transit coordinates.
Calculate →Barometric Pressure Tracker
Track real-time barometric pressure trends nearby using NWS stations to predict pre-front bite windows.
Calculate →Livewell Temp & O2 Guide
Calculate target livewell temperatures and aeration requirements by species to prevent thermal shock.
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Regulations & Size Limits
Verify state harvest seasons, daily bag limits, and size slot regulations before keeping your catch.
Trip Planning & Logs
Split fuel and tournament costs, or record your catch logs privately.
Built for anglers, tested on the water
Consistent formulas
We use standard water-drag calculations, verified line-test parameters, and published livewell biology guides to ensure reliable recommendations.
100% private
Everything runs in your browser. No data is sent to external servers, no tracking, and no internet required once the page is loaded.
Instant & lightweight
Pure static HTML with zero heavy framework bloat. Fast loading on mobile even with weak, remote lake cellular connections.
Results are estimates. Verify catch sizes, bag limits, and boating requirements with your local department of natural resources.