How much woulg a largemouth weigh that was 21 inches long and 17 inches around the belly?

try this site

http://www.bassresource.com/bassfishing/fishcalculator.html

Thanks alot!

2
formula is lenght X (girth) = wieght
_____________
R
for bass r= 800
for pike r= 900
so your bass is 21 x(17 sqared)/by 800 or 7.58 lb

Bruce -
That Formula seems a little generous to me. According to it the fish on my wall weight 14.8#s

24.5 X 22.

On a certified scale it weight 10.5

Tight lines
Curt

here is the real formula

(length x length) x girth Divided By 1200.