Length to Weight Converter Help Protect Star Lake If you see a violation of the fish and game laws PLEASE CALL TIP: 800-650-9093 Use this DNR converter to approximate the weight of your catch without having to handle the fish too much before releasing it. Please remember to practice selective harvest. Minnesota DNR Length-to-Weight Conversions Northern Pike Enter the Length: (in.) The Weight is (lbs.) Walleye Enter the Length: (in.) The Weight is (lbs.) Sunfish and Crappie Enter the Length: (in.) The Weight is (lbs.) Bass Enter the Length: (in.) Enter the Girth: (in.) The Weight is (lbs.)