This is a planning estimator, not an exact catch-probability calculator. Enter the rod and bait power shown in-game plus any flat bonus values you want to include.
Setup score
55 entered fishing-power points.
What this score means
The tool simply adds the values you entered so you can compare two setups consistently. Terraria's actual fishing outcomes also depend on conditions, pool quality and game rules not modeled here.
Use it for before/after comparisons
Change one piece of gear or buff, update the inputs, and compare the setup score. This is more useful than treating the result as an exact prediction of crate or fish odds.
Location still decides what can be caught
A stronger setup cannot replace the correct biome, layer or pool. Use the Fishing Session Checklist before a targeted trip.