How to determine the mass in ounce

Mass (in pound) = 1400 pound

Mass (in ounce) =?

1 pound = 16 ounce

Therefore,

1400 pound =1400 × 16

1400 pound = 22400 ounce

1 pound = 1 pound

A pound is a measure of mass, and mass will remain constant.

No, they are different units for mass. Kilogram is the SI unit of mass and pound is an imperial unit of mass. To convert from kg to pound, multiply the kg unit by 2.20462 and to convert from pound to kg, multiply the pound unit by 0.453592.

A pound of feathers has more mass. The are lighter so they would take up more space to make a pound.