Fish Weight Estimator
Estimate a fish's weight from its length and girth measurements using species-specific formulas.
Inputs
in
in
Results
Estimated Weight
2.16 lbs
Estimated Weight0.98 kg
Trophy Threshold8 lbs
% of World Record9.71%
How to Use This Calculator
- Measure the fish's total length in inches from nose tip to tail tip with its mouth closed.
- Measure the girth in inches at the fish's widest point, usually just ahead of the dorsal fin. Leave at 0 for a length-only estimate.
- Select the species (bass, trout, walleye, pike, catfish, or salmon) for species-specific weight formulas.
- Read Estimated Weight in lbs and kg — this uses both length-girth and power-curve formulas for accuracy.
- Compare your fish to the Trophy Threshold to see if it qualifies as a trophy for your species.
- Check % of World Record to see how your catch ranks against the all-tackle record.
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