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Mass is in kilograms - weight is different. Say if someone says they weigh 50 kilograms this is wrong - their mass is 50 kilograms. You multiply their mass by the force of gravity (around 9.8 Newtons on Earth although we'll round it to 10) so each kilogram has a weight of 10 Newtons (even though it is 9.8, we are rounding). So you simply multiply 50 by 10 to obtain 500 Newtons.
So mass is measured in kilograms and not to be confused with weight.
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Units of kilograms can be used in measurements of?
The kilogram is a unit of mass.
What are two metric units commonly used for mass?
Grams and Kilogarms
What units are used to measure the weight of an object?
The same units as mass, for objects in the same gravitational reference frame.
Why are kilograms used in SI?
Because a measure of mass is desired in the set of standard units.
What is the mass units for density?
Density is measured in units of mass divided by units of volume. The SI unit is kilograms/meter3.
