Salmon Weight Estimate

[SalmonGuy]

Hey walleye guys - does anyone have a reliable method for estimating chinook salmon weight? My wife caught a 33" chinook and our son caught a 32" chinook; both on May 20 in the south end of Lake Superior. Assume average girth for spring...
Any good guesses? Thanks in advance.

[GreggB]

Well I just caught a 36.5 incher that tipped the scales at 26.5 lbs. I would guess yours to be in the low twenties.