Pick up two objects, one in each hand. Which feels heavier? Now weigh them. Sometimes your hands are right — sometimes they're fooled by size.
1 kg = 2.2046 lb
Mass vs weight
Mass is how much stuff is in something — it never changes. Weight is the pull of gravity on that mass. On the Moon your weight drops to about a sixth; your mass stays the same.
A bowling ball and a big cushion can have the same mass, but the cushion feels lighter because the mass is spread out. Mass per volume is density.
Two bags balance a 1 kg weight together; one bag is 350 g. What's the other?
Mass vs weight
Mass is how much stuff is in something. Weight is the pull of gravity on that mass. On the moon, your weight changes; your mass doesn't.
A bowling ball and a cushion can be the same mass, but the cushion feels lighter because it's spread out. Density is mass per volume.