That all depends on what kind of mattress you have. Is it a twin or is it more like a king sized mattress? Is it a traditional spring mattress? How many coils does it have? The more coils the heavier it is. Also, is it a foam mattress? Foam mattress can be heavy depending on its density.
Mattresses can weigh from 60 to 200 pounds, depending on the size. Over time, mattresses gain weight as they gather dust, skin cells, and absorb moisture.
This depends on the size of the mattress and the depth. It also depends on the material the mattress is made from. The best way to check the weight is to look at it online even if you intend to buy it in a store. You will be given the shipping weight of the mattress.
a queen size mattress weighs approximately 200 lbs.
a king size mattress weighs somewhere between 85 and 115 lbs.
The weight of a king mattress varies.