why do we put kilos/pounds as a unit of weight when filling up a resume or bio data should it be Newton?

Question

The standard unit for mass is kilo
The standard unit for weight is Newton or kg.m/s2
Mass is not affected by the change of location of the object while weight is being affected due to change in gravitational pull.

Answer 1

EDITED ANSWER:

We use the terms "pound" and "kilo" (kilogram) for weight because these are shorthand for "poundweight" and "kilogramweight", abbreviated lbwt and kgwt. These units are the force exerted by the corresponding mass (pound and kilogram) under the influence of 1g of gravity. The kgwt is equal to 9.8N. The shorthand terms are not correct, but have come into common use. When you put a 1kg mass on a (spring) scale on earth, it *measures* 9.8N but the scale *reads* 1kg. Put that scale on a planet with half the gravitational force of earth, and it will *read* 0.5 kg, that is not the mass, but the weight in kgwt. The scale would have to be recalibrated to read "mass" on that planet.

A beam balance measures true mass. and will give the same result in different gravity fields. A "standard" mass is used as a reference.

Answer 2

You are wrong.

The error lies not in quoting in kilos but in calling it weight. What we are interested in is the MASS of a person or object, because this is invariant with location. The weight strictly would be useless because you would need to know where it was measured to be accurate.

Balances of course measure a force, but convert this to the equivalent mass. In most practical purposes the variations in gravity are unimportant and the same conversion is used everywhere. For very sensitive balances, recalibration is needed using a reference mass.