A king size mattress typically weighs between 130 and 180 pounds. The variability in weight comes down to material and thickness. Generally, latex is heaviest, followed by hybrid, memory foam, and finally innerspring—although this varies based on foam density and other factors.
If you plan to buy a king size latex or hybrid mattress, consider purchasing White Glove Delivery—a service with mattress delivery and set-up. This way, you won’t need to lug a heavy bed through your home and up or down stairs.
Make sure you buy a bed frame that can handle the weight of your mattress. Many online bed companies sell frames and adjustable bases specifically made for their mattresses. But if you buy a different brand, check the weight capacity.