(6 + 5/16) /2.2 = 2.896 kg
90lbs is 41kg
120 kilograms is 264 pounds 9 ounces.
103.5 Kgs
If you ment pounds then 80 pounds=36.2873896 Kilograms
66 kilograms is 145.51 pounds.
1 pound = 0.453 kilograms.
174 pounds = 78.9 kilograms.
57 kilograms = 125.7 pounds.
50 pounds = 22.68 kilograms
That would be 319.67 Ibs
350 pounds is ~158.76 kilograms.