Fishing Calculators

Fishing Reel Drag Setting Calculator

Set your fishing reel drag correctly. Enter line test strength to get light, standard, and fight-drag settings in pounds for any spinning or baitcast reel.

Fishing Reel Line Capacity Calculator

Estimate how much monofilament line fits on a reel when using a different pound test than rated. Useful for spooling reels with available line weights.

Trolling Motor Battery Runtime Calculator

Estimate trolling motor battery runtime from amp-hour capacity and thrust level. Covers 12V and 24V setups at four common speed settings.

Fishing Tidal Bite Window Calculator

Estimate the best fishing bite window across a tide cycle. Get peak feeding times based on tidal stage, moon phase, and species behavior for anglers.

Catch and Release Survival Rate Calculator

Estimate fish survival after catch and release. Water temperature, fight time, and handling practices all affect whether a released fish recovers and survives.

Fish Age from Length Calculator

Estimate the age of a fish from its length. Uses species-specific growth models for trout, bass, walleye, and common freshwater species.

Fish Weight from Length Calculator

Estimate fish weight from length and girth measurements. Useful for catch-and-release fishing without a scale. Works for bass, trout, pike, and more.

Fishing Current and Drift Speed Calculator

Calculate river current speed and drift fishing pace in mph or km/h from GPS data or float time. Optimize drift speed for the best lure or fly presentation.

Fishing Hook Size Guide Calculator

Find the right hook size for your target fish species and bait type. Get a recommended hook range for freshwater and saltwater fishing.

Fishing Knot Strength Calculator

Compare fishing knot strength as a percentage of line breaking strength. Find which knots retain the most line strength for your application.

Fishing Line Strength and Knot Calculator

Calculate effective fishing line strength after knot loss. Most fishing knots reduce line strength by 15-30%. Find the right line test for your target fish.

Fishing Sinker Weight Calculator

Calculate the right sinker weight for fishing in current and at depth. Avoid too light (drifting off target) or too heavy (lost to snags) sinkers.

Fly Fishing Tippet Size Calculator

Match tippet X-size to fly hook size and breaking strength. The rule of 3 and rule of 4 explained. Essential for fly fishing leader selection.

Fly Line Weight Selector

Match fly line weight to your rod rating, fishing conditions, and target species. Covers AFTMA line weight standards from #1 trout rigs to #14 big game.

Lure Trolling Depth Calculator

Estimate how deep a lure runs when trolling based on line diameter, trolling speed, and amount of line out. Plan your trolling presentation.

Moon Phase Fishing Activity Calculator

Calculate fishing activity score based on moon phase and solunar theory. Find the best fishing times using major and minor solunar periods.