Chum Amount Calculator
Estimate how much chum to bring for a fishing trip from hours on the water, current and how many lines you run.
How it works
chum = base rate (lb/hr by target) × current multiplier × hours · blocks = total ÷ 7 lb
A chum slick works only if it is continuous — a steady, unbroken trail of scent that leads fish back to your baits — so you plan by pounds per hour rather than a single dump. Stronger current carries the slick away faster and calls for a higher rate to keep it unbroken, while a big shark slick burns through chum quickly. Bring a margin: running out mid-bite lets the fish drift off, and it can take a long time to rebuild the slick.
Worked example
Four hours offshore (2.5 lb/hr) in moderate current (×1.0): 2.5 × 1.0 × 4 = 10 lb, or about 1.4 frozen blocks. Strong current (×1.4) would push that to 14 lb.
Frequently asked questions
How much chum do I need for a day of fishing?
It depends on hours, current and target, but many inshore trips use 1–2 lb per hour and offshore or shark trips considerably more. Always bring extra so the slick never breaks.
Why keep the slick continuous?
Fish follow the scent trail up-current to its source. If the trail breaks, they lose it and scatter, and it can take a long time to draw them back once the slick restarts.
Does current change how much I need?
Yes. Faster current disperses chum more quickly, so you need a higher rate to maintain an unbroken slick. In slack water a lighter rate holds the trail together.
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This calculator is for educational purposes. Double-check important results before acting on them.