How this calculator works
Start with the inventory volume, then allow for how you will stack it and whether you need to reach belongings during storage. The recommendation is a nominal floor size rather than a promise of fit. A low ceiling, deep shelving or furniture that cannot stack can make the next size more practical.
How to use this estimate
Storage estimates depend on ceiling height, how efficiently items stack and whether you need an access aisle.
What can change the result
Measurements, provider specifications, packing style and local access conditions can all change the answer. Use the result as a planning range, then verify the actual vehicle, unit, product dimensions or supplier rules before you book or buy.