Fish Weight Calculator: Estimate Catch Weight by Length and Girth

Your details

Select the species to apply the correct formula divisor.
Measure tip of mouth to end of tail fin (total length).
in
Measure the widest circumference, usually just ahead of the dorsal fin.
in
Estimated weightKeeper size
2.16

Best estimate using the standard length-girth formula

Low estimate1.94
High estimate2.38
FormulaLength x Girth^2 / 1200
Low estimate1.94
Best estimate2.16
High estimate2.38

Estimated weight: 2.16 lb

  • Your Largemouth Bass weighs an estimated 2.16 lb, with a typical range of 1.94 to 2.38 lb.
  • The length-girth formula is most accurate when you measure girth at the widest point, usually just forward of the dorsal fin.
  • Release fish promptly to preserve populations. Use a rubberized net and wet your hands before handling.

Next stepLog your catch with length, girth, and location for a complete fishing record.

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