Foam Density (kg/m³)
By Kaiser Khan, Editor Updated First published
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In short
Foam density is the mass of foam in one cubic metre, measured in kg/m³. It is not the same as firmness. Higher density usually means more material in the same space, which often resists permanent dips better. Soft high-density foam and firm low-density foam both exist. Read density with hardness and layer depth.
About 1 minutes to read
Definition. Foam density is how much foam mass fits in one cubic metre, in kg/m³. It is not the same as how firm the foam feels.
Hardness is a separate measure, often given as ILD or IFD. A foam can be dense and soft, or light and firm.
Compare density between foams of the same type. Memory foam and reflex foam are not graded on the same scale.
Full guide: foam density explained.