How Much Does a King Size Bed Weigh?

Innerspring mattresses are generally lighter in weight than memory foam or latex foam mattresses, according to Amerisleep. A low-density memory foam mattress is a few pounds heavier that an innerspring mattress. A memory foam mattress with a density of greater than 4 pounds weighs almost 30 percent more than an innerspring. Adding a foam pillow-top to an innerspring mattress increases the weight of the bed.