Caught a nice largemouth and want to know what it weighs without a scale? This largemouth bass length-to-weight chart gives the average weight for fish in typical condition. Find the length, read across, and get a quick estimate.
Largemouth Bass length-to-weight chart
These figures follow widely published largemouth bass data (In-Fisherman and state fisheries agencies) for a fish in average condition. They are length-only averages, so treat them as a starting point rather than an exact reading.
Why your fish may weigh more or less
A chart can only show an average, because two largemouth bass of the same length can differ in weight by 20% or more. A pre-spawn female loaded with eggs, a fish fattened on a rich food supply, or simply a deep-bodied individual will all weigh more than the table suggests. Water temperature, season, and region matter too, which is why girth — the distance around the fish at its fattest point — is the single best predictor of true weight.
Get a weight tailored to your fish
For a number matched to your exact fish, measure both length and girth and drop them into our free fish weight calculator — it applies the proven length-and-girth formula and is usually accurate within 5–10%. New to measuring? Our guide on how to estimate a fish’s weight walks through it step by step.
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