How this calculator works
Measure usable interior dimensions when possible, since nominal unit names may include space you cannot fill. Tall furniture and irregular items leave gaps; an access aisle uses capacity too. Use the usable figure as a planning allowance and confirm whether the inventory can actually stack within the height.
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.
Planning note: Do not use this calculator as a substitute for payload limits, lifting guidance, building rules or professional quotations.