For example, a stated 50:1 volume reduction ratio means that, under the stated conditions, the output occupies about one-fiftieth of the loose input volume. It does not mean the machine turns 50 kilograms into one kilogram: the mass is not reduced by compaction.

The achievable ratio varies with foam type, starting density, moisture, contamination and machine settings. Use model specifications and a test of the actual material to estimate storage and transport needs.