How many pounds is 80 oz?

1 Pound = 16 Ounces

14 Pounds = 1 Stone

8 stones = 1 hundredweight therefore

80 oz = 5 Pound (80/16)

Alternatively 1Ounce = 0.0625 lb pound

80 oz * 0.0625 = 5 lb

1Ounce = 0.028349523 kg Kilogram

1Ounce = 28.349523125 g gram

1Ounce = 28349.523125 ml milligram

1Ounce = 28349523.125 mg microgram