How long do foam mattresses last?

A foam mattress typically lasts 7 to 10 years before sagging or lost support means it needs replacing. Higher-density memory foam usually reaches the top of that range, while thin, low-density foam wears out sooner.

Foam mattress lifespan depends on foam density, layer thickness, and body weight. Lower-density foam compresses into body impressions faster, which shows up as sagging and morning aches. Heavier sleepers and daily use speed that wear. A foam mattress rarely fails all at once, so the signs are gradual: visible dips, lost firmness, and worsening sleep.

A foam mattress typically lasts 7 to 10 years under normal nightly use.
Foam mattress density is the main durability factor: higher-density foam resists permanent body impressions longer.
A foam mattress comfort layer of 3 inches or more indicates meaningful pressure relief and longer-lasting support.
Warranty on a foam mattress is commonly 10 years, though coverage usually excludes normal softening.
Sagging, visible body impressions, and new back pain are the standard replacement signs for a foam mattress.