Mattresses should generally be changed every 6 to 10 years, depending on the type, quality, and how well they are maintained. The typical lifespan is about 7 to 8 years for most mattresses, with some lasting up to 15 or 20 years if well cared for, such as latex mattresses. Signs for needing a replacement include sagging, loss of comfort and support, increased allergies, and waking up with pain or stiffness. Memory foam mattresses tend to last longer than traditional innerspring types. Regular replacement is important for health, hygiene, and maintaining quality sleep.

Here is a summary of average mattress lifespan based on type:

Mattress Type| Average Lifespan
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Memory Foam| 7-10 years
Innerspring| 5-8 years
Hybrid| 7-10 years
Latex| Up to 15-20 years
Adjustable| 6-8 years
Air Mattress| 2-4 years
Pillow-Top| 5-8 years

The recommended rule of thumb is to assess comfort and support regularly and replace a mattress once it no longer provides proper sleep quality or when visible signs like sagging or noise appear. Changing your mattress every 6 to 8 years is a good practice for maintaining health and well-being.