Question 1

How do I calculate fish weight from length?

Accepted Answer

Weight (lbs) = (length x girth^2) / 800 for most round-bodied fish. For bass specifically: weight = (length x girth^2) / 1,200 or use length-weight regression for the specific species. Without a girth measurement, use weight = a x length^b where a and b are species-specific constants from fisheries data.

Question 2

What is catch per unit effort (CPUE)?

Accepted Answer

CPUE = total catch (weight or number) / total fishing effort (hours, trips, or net-metres). It is the standard index of fish stock abundance used by fisheries managers. A declining CPUE over time suggests declining stock density. Commercial fishers track CPUE as a key indicator of fishing ground productivity.

Question 3

What are the best tides for fishing?

Accepted Answer

Most species are most active during tide changes - the 2 hours either side of high and low water. Moving water oxygenates the water column and moves baitfish. Spring tides (new and full moon) create stronger currents than neap tides. Many species feed heavily on the flood tide as water pushes food onto shallow ground.

Question 4

Are these fishing tools free?

Accepted Answer

Yes - completely free, no sign-up required. Results export to CSV or PDF.

Free Fishing Tools & Calculators

Fishing calculators for anglers and charter operators

Fishing Tools - FAQ