How much does a Cessna 152 airplane weigh?

It can vary quite a lot, depending on equipment fitted and paint thickness etc.

Older radiOS and instruments can be heavier than modern versions. Aircraft have to be weighed periodically, to see if they have put weight on, as take off and landing weight has to be worked out.

Maximum take off weight, is 1670 lbs, or 758kg. If the aircraft weighs 1170 lbs,then you need pilot, passenger and fuel to be 500lbs or less, to ensure a safe take off.